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Lu K, He X, Zhang C, Li Z, Zhang S, Min B, Zhang J, Zhao J, Shi L, Peng Y, Feng S, Liu Q, Song J, Yu R, Wang X, Wang Y, Bykov M, Jin C. Superconductivity with T c of 116 K discovered in antimony polyhydrides. Natl Sci Rev 2024; 11:nwad241. [PMID: 38883292 PMCID: PMC11173185 DOI: 10.1093/nsr/nwad241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/11/2023] [Accepted: 08/21/2023] [Indexed: 06/18/2024] Open
Abstract
Superconductivity (SC) was experimentally observed for the first time in antimony polyhydride. The diamond anvil cell combined with a laser heating system was used to synthesize the antimony polyhydride sample at high pressure and high temperature. In-situ high pressure transport measurements as a function of temperature with an applied magnetic field were performed to study the SC properties. It was found that the antimony polyhydride samples show superconducting transition with critical temperature T c 116 K at 184 GPa. The investigation of SC at magnetic field revealed the superconducting coherent length of ∼40 Å based on the Ginzburg Landau (GL) equation. Antimony polyhydride superconductor has the second highest T c in addition to sulfur hydride among the polyhydrides of elements from main groups IIIA to VIIA in the periodic table.
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Affiliation(s)
- Ke Lu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Xin He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan 523808, China
| | - Changling Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Zhiwen Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Sijia Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Baosen Min
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Jun Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Jianfa Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Luchuan Shi
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yi Peng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Shaomin Feng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Qingqing Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jing Song
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Richeng Yu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Xiancheng Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yu Wang
- Institute of Geosciences, Goethe University Frankfurt, Frankfurt 60438, Germany
| | - Maxim Bykov
- Institute of Inorganic Chemistry, University of Cologne, Cologne 50939, Germany
| | - Changqing Jin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan 523808, China
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2
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Sun Y, Zhong X, Liu H, Ma Y. Clathrate metal superhydrides under high-pressure conditions: enroute to room-temperature superconductivity. Natl Sci Rev 2024; 11:nwad270. [PMID: 38883291 PMCID: PMC11173197 DOI: 10.1093/nsr/nwad270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/16/2023] [Accepted: 09/21/2023] [Indexed: 06/18/2024] Open
Abstract
Room-temperature superconductivity has been a long-held dream of mankind and a focus of considerable interest in the research field of superconductivity. Significant progress has recently been achieved in hydrogen-based superconductors found in superhydrides (hydrides with unexpectedly high hydrogen contents) that are stabilized under high-pressure conditions and are not capturable at ambient conditions. Of particular interest is the discovery of a class of best-ever-known superconductors in clathrate metal superhydrides that hold the record for high superconductivity (e.g. T c = 250-260 K for LaH10) among known superconductors and have great promise to be those that realize the long-sought room-temperature superconductivity. In these peculiar clathrate superhydrides, hydrogen forms unusual 'clathrate' cages containing encaged metal atoms, of which such a kind was first reported in a calcium hexa-superhydride (CaH6) showing a measured high T c of 215 K under a pressure of 170 GPa. In this review, we aim to offer an overview of the current status of research progress on the clathrate metal superhydride superconductors, discuss the superconducting mechanism and highlight the key features (e.g. structure motifs, bonding features, electronic structure, etc.) that govern the high-temperature superconductivity. Future research direction along this line to find room-temperature superconductors will be discussed.
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Affiliation(s)
- Ying Sun
- Key Laboratory of Material Simulation Methods & Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Xin Zhong
- Key Laboratory of Material Simulation Methods & Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Hanyu Liu
- Key Laboratory of Material Simulation Methods & Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Yanming Ma
- Key Laboratory of Material Simulation Methods & Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
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3
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Zhao W, Huang X, Zhang Z, Chen S, Du M, Duan D, Cui T. Superconducting ternary hydrides: progress and challenges. Natl Sci Rev 2024; 11:nwad307. [PMID: 38883295 PMCID: PMC11173187 DOI: 10.1093/nsr/nwad307] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/29/2023] [Accepted: 10/29/2023] [Indexed: 06/18/2024] Open
Abstract
Since the discovery of the high-temperature superconductors H3S and LaH10 under high pressure, compressed hydrides have received extensive attention as promising candidates for room-temperature superconductors. As a result of current high-pressure theoretical and experimental studies, it is now known that almost all the binary hydrides with a high superconducting transition temperature (T c) require extremely high pressure to remain stable, hindering any practical application. In order to further lower the stable pressure and improve superconductivity, researchers have started exploring ternary hydrides and had many achievements in recent years. Here, we discuss recent progress in ternary hydrides, aiming to deepen the understanding of the key factors regulating the structural stability and superconductivity of ternary hydrides, such as structural motifs, bonding features, electronic structures, electron-phonon coupling, etc. Furthermore, the current issues and challenges of superconducting ternary hydrides are presented, together with the prospects and opportunities for future research.
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Affiliation(s)
- Wendi Zhao
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Zihan Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Su Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Mingyang Du
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Tian Cui
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
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Liu P, Wang C, Zhang D, Wang X, Duan D, Liu Z, Cui T. Strategies for improving the superconductivity of hydrides under high pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:353001. [PMID: 38754446 DOI: 10.1088/1361-648x/ad4ccc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Accepted: 05/16/2024] [Indexed: 05/18/2024]
Abstract
The successful prediction and confirmation of unprecedentedly high-temperature superconductivity in compressed hydrogen-rich hydrides signify a remarkable advancement in the continuous quest for attaining room-temperature superconductivity. The recent studies have established a broad scope for developing binary and ternary hydrides and illustrated correlation between specific hydrogen motifs and high-Tcs under high pressures. The analysis of the microscopic mechanism of superconductivity in hydrides suggests that the high electronic density of states at the Fermi level (EF), the large phonon energy scale of the vibration modes and the resulting enhanced electron-phonon coupling are crucial contributors towards the high-Tcphonon-mediated superconductors. The aim of our efforts is to tackle forthcoming challenges associated with elevating theTcand reducing the stabilization pressures of hydrogen-based superconductors, and offer insights for the future discoveries of room-temperature superconductors. Our present Review offers an overview and analysis of the latest advancements in predicting and experimentally synthesizing various crystal structures, while also exploring strategies to enhance the superconductivity and reducing their stabilization pressures of hydrogen-rich hydrides.
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Affiliation(s)
- Pengye Liu
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Chang Wang
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Daoyuan Zhang
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Xiang Wang
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Zhao Liu
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Tian Cui
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
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5
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Song X, Hao X, Wei X, He XL, Liu H, Ma L, Liu G, Wang H, Niu J, Wang S, Qi Y, Liu Z, Hu W, Xu B, Wang L, Gao G, Tian Y. Superconductivity above 105 K in Nonclathrate Ternary Lanthanum Borohydride below Megabar Pressure. J Am Chem Soc 2024; 146:13797-13804. [PMID: 38722223 DOI: 10.1021/jacs.3c14205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Hydrides are promising candidates for achieving room-temperature superconductivity, but a formidable challenge remains in reducing the stabilization pressure below a megabar. In this study, we successfully synthesized a ternary lanthanum borohydride by introducing the nonmetallic element B into the La-H system, forming robust B-H covalent bonds that lower the pressure required to stabilize the superconducting phase. Electrical transport measurements confirm the presence of superconductivity with a critical temperature (Tc) of up to 106 K at 90 GPa, as evidenced by zero resistance and Tc shift under an external magnetic field. X-ray diffraction and transport measurements identify the superconducting compound as LaB2H8, a nonclathrate hydride, whose crystal structure remains stable at pressures as low as ∼ half megabar (59 GPa). Stabilizing superconductive stoichiometric LaB2H8 in a submegabar pressure regime marks a substantial advancement in the quest for high-Tc superconductivity in polynary hydrides, bringing us closer to the ambient pressure conditions.
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Affiliation(s)
- Xiaoxu Song
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Xiaokuan Hao
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Xudong Wei
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Xin-Ling He
- Institute of Physics, Henan Academy of Sciences, Zhengzhou 450046, China
| | - Hanyu Liu
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
| | - Liang Ma
- Key Laboratory of Materials Physics (Ministry of Education), School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Guangtao Liu
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
| | - Hongbo Wang
- State Key Laboratory of Superhard Materials and International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Jingyu Niu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Shaojie Wang
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Yanpeng Qi
- School of Physical Science and Technology and Shanghai Tech Laboratory for Topological Physics, Shanghai Tech University, Shanghai 201210, China
| | - Zhongyuan Liu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Wentao Hu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Bo Xu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Lin Wang
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Guoying Gao
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Yongjun Tian
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
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Chen S, Wang Y, Bai F, Wu X, Wu X, Pakhomova A, Guo J, Huang X, Cui T. Superior Superconducting Properties Realized in Quaternary La-Y-Ce Hydrides at Moderate Pressures. J Am Chem Soc 2024; 146:14105-14113. [PMID: 38717019 DOI: 10.1021/jacs.4c02586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
The recent revolution in the superconductivity field stems from hydride superconductors. Multicomponent hydrides provide a crucial platform for tracking high-temperature superconductors. Besides high superconducting transition temperature (Tc), achieving both giant upper critical magnetic field [μ0Hc2(0)] and high critical current density [Jc(0)] is also key to the latent potential of the application for hydride superconductors. In this work, we have successfully synthesized quaternary La-Y-Ce hydrides with excellent properties under moderate pressure by using the concept of "entropy engineering." The obtained temperature dependence of the resistance provides evidence for the superconductivity of Fm3m-(La,Y,Ce)H10, with the maximum Tc ∼ 190 K (at 112 GPa). Notably, Fm3m-(La,Y,Ce)H10 boasts exceptional properties: μ0Hc2(0) reaching 292 T and Jc(0) surpassing 4.61 × 107 A/cm2. Compared with the binary LaH10/YH10, we find that the Fm3m structure in (La,Y,Ce)H10 can be stable at relatively low pressures (112 GPa). These results indicate that multicomponent hydrides can significantly enhance the superconducting properties and regulate stabilizing pressure through the application of "entropy engineering." This work stimulates the experimental exploration of multihydride superconductors and also provides a reference for the search of room-temperature superconductors in more diversified hydride materials in the future.
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Affiliation(s)
- Su Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Yulong Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Fuquan Bai
- Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130021, P. R. China
| | - Xinzhao Wu
- Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130021, P. R. China
| | - Xinyue Wu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Anna Pakhomova
- European Synchrotron Radiation Facility, ESRF, Grenoble 38043, Cedex 9, France
| | - Jianning Guo
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
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7
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Li X, Guo Z, Zhang X, Yang G. Layered Hydride LiH 4 with a Pressure-Insensitive Superconductivity. Inorg Chem 2024; 63:8257-8263. [PMID: 38662198 DOI: 10.1021/acs.inorgchem.4c00520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
For hydride superconductors, each significant advance is built upon the discovery of novel H-based structural units, which in turn push the understanding of the superconducting mechanism to new heights. Based on first-principles calculations, we propose a metastable LiH4 with a wavy H layer composed of the edge-sharing pea-like H18 rings at high pressures. Unexpectedly, it exhibits pressure-insensitive superconductivity manifested by an extremely small pressure coefficient (dTc/dP) of 0.04 K/GPa. This feature is attributed to the slightly weakened electron-phonon coupling with pressure, caused by the reduced charge transfer from Li atoms to wavy H layers, significantly suppressing the substantial increase in the contribution of phonons to Tc. Its superconductivity originates from the strong coupling between the H 1s electrons and the high-frequency phonons associated with the H layer. Our study extends the list of H-based structural units and enhances the in-depth understanding of pressure-related superconductivity.
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Affiliation(s)
- Xing Li
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Zixuan Guo
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Xiaohua Zhang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
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Aslandukova A, Aslandukov A, Laniel D, Yin Y, Akbar FI, Bykov M, Fedotenko T, Glazyrin K, Pakhomova A, Garbarino G, Bright EL, Wright J, Hanfland M, Chariton S, Prakapenka V, Dubrovinskaia N, Dubrovinsky L. Diverse high-pressure chemistry in Y-NH 3BH 3 and Y-paraffin oil systems. SCIENCE ADVANCES 2024; 10:eadl5416. [PMID: 38478619 PMCID: PMC10936948 DOI: 10.1126/sciadv.adl5416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/09/2024] [Indexed: 03/17/2024]
Abstract
The yttrium-hydrogen system has gained attention because of near-ambient temperature superconductivity reports in yttrium hydrides at high pressures. We conducted a study using synchrotron single-crystal x-ray diffraction (SCXRD) at 87 to 171 GPa, resulting in the discovery of known (two YH3 phases) and five previously unknown yttrium hydrides. These were synthesized in diamond anvil cells by laser heating yttrium with hydrogen-rich precursors-ammonia borane or paraffin oil. The arrangements of yttrium atoms in the crystal structures of new phases were determined on the basis of SCXRD, and the hydrogen content estimations based on empirical relations and ab initio calculations revealed the following compounds: Y3H11, Y2H9, Y4H23, Y13H75, and Y4H25. The study also uncovered a carbide (YC2) and two yttrium allotropes. Complex phase diversity, variable hydrogen content in yttrium hydrides, and their metallic nature, as revealed by ab initio calculations, underline the challenges in identifying superconducting phases and understanding electronic transitions in high-pressure synthesized materials.
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Affiliation(s)
- Alena Aslandukova
- Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI), University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany
| | - Andrey Aslandukov
- Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI), University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
| | - Dominique Laniel
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, UK
| | - Yuqing Yin
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
| | - Fariia Iasmin Akbar
- Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI), University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany
| | - Maxim Bykov
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Timofey Fedotenko
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Anna Pakhomova
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France
| | - Gaston Garbarino
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France
| | | | - Jonathan Wright
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France
| | - Michael Hanfland
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France
| | - Stella Chariton
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, USA
| | - Vitali Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, USA
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
| | - Leonid Dubrovinsky
- Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI), University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany
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9
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Chen LC, Luo T, Cao ZY, Dalladay-Simpson P, Huang G, Peng D, Zhang LL, Gorelli FA, Zhong GH, Lin HQ, Chen XJ. Synthesis and superconductivity in yttrium-cerium hydrides at high pressures. Nat Commun 2024; 15:1809. [PMID: 38418489 PMCID: PMC10901869 DOI: 10.1038/s41467-024-46133-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 02/12/2024] [Indexed: 03/01/2024] Open
Abstract
Further increasing the critical temperature and/or decreasing the stabilized pressure are the general hopes for the hydride superconductors. Inspired by the low stabilized pressure associated with Ce 4f electrons in superconducting cerium superhydride and the high critical temperature in yttrium superhydride, we carry out seven independent runs to synthesize yttrium-cerium alloy hydrides. The synthetic process is examined by the Raman scattering and X-ray diffraction measurements. The superconductivity is obtained from the observed zero-resistance state with the detected onset critical temperatures in the range of 97-141 K. The upper critical field towards 0 K at pressure of 124 GPa is determined to be between 56 and 78 T by extrapolation of the results of the electrical transport measurements at applied magnetic fields. The analysis of the structural data and theoretical calculations suggest that the phase of Y0.5Ce0.5H9 in hexagonal structure with the space group of P63/mmc is stable in the studied pressure range. These results indicate that alloying superhydrides indeed can maintain relatively high critical temperature at relatively modest pressures accessible by laboratory conditions.
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Affiliation(s)
- Liu-Cheng Chen
- School of Science, Harbin Institute of Technology, Shenzhen, 518055, China
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
| | - Tao Luo
- School of Science, Harbin Institute of Technology, Shenzhen, 518055, China
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
| | - Zi-Yu Cao
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
- Center for Quantum Materials and Superconductivity (CQMS) and Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | | | - Ge Huang
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
| | - Di Peng
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
| | - Li-Li Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Federico Aiace Gorelli
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
- National Institute of Optics (INO-CNR) and European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, 50019, Sesto Fiorentino (Florence), Italy
| | - Guo-Hua Zhong
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hai-Qing Lin
- School of Physics, Zhejiang University, Hangzhou, 310058, China
| | - Xiao-Jia Chen
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA.
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10
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Setty C, Baggioli M, Zaccone A. Anharmonic theory of superconductivity and its applications to emerging quantum materials. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:173002. [PMID: 38252997 DOI: 10.1088/1361-648x/ad2159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 01/22/2024] [Indexed: 01/24/2024]
Abstract
The role of anharmonicity on superconductivity has often been disregarded in the past. Recently, it has been recognized that anharmonic decoherence could play a fundamental role in determining the superconducting properties (electron-phonon coupling, critical temperature, etc) of a large class of materials, including systems close to structural soft-mode instabilities, amorphous solids and metals under extreme high-pressure conditions. Here, we review recent theoretical progress on the role of anharmonic effects, and in particular certain universal properties of anharmonic damping, on superconductivity. Our focus regards the combination of microscopic-agnostic effective theories for bosonic mediators with the well-established BCS theory and Migdal-Eliashberg theory for superconductivity. We discuss in detail the theoretical frameworks, their possible implementation within first-principles methods, and the experimental probes for anharmonic decoherence. Finally, we present several concrete applications to emerging quantum materials, including hydrides, ferroelectrics and systems with charge density wave instabilities.
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Affiliation(s)
- Chandan Setty
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, United States of America
| | - Matteo Baggioli
- Wilczek Quantum Center, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, People's Republic of China
| | - Alessio Zaccone
- Department of Physics 'A. Pontremoli', University of Milan, via Celoria 16, 20133 Milan, Italy
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, CB30HE Cambridge, United Kingdom
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11
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Chen S, Qian Y, Huang X, Chen W, Guo J, Zhang K, Zhang J, Yuan H, Cui T. High-temperature superconductivity up to 223 K in the Al stabilized metastable hexagonal lanthanum superhydride. Natl Sci Rev 2024; 11:nwad107. [PMID: 38116091 PMCID: PMC10727841 DOI: 10.1093/nsr/nwad107] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 12/21/2023] Open
Abstract
As compressed hydrides constantly refresh the records of superconducting critical temperatures (Tc) in the vicinity of room temperature, this further reinforces the confidence to find more high-temperature superconducting hydrides. In this process, metastable phases of superhydrides offer enough possibilities to access superior superconducting properties. Here we report a metastable hexagonal lanthanum superhydride (P63/mmc-LaH10) stabilized at 146 GPa by introducing an appropriate proportion of Al, which exhibits high-temperature superconductivity with Tc ∼ 178 K, and this value is enhanced to a maximum Tc ∼ 223 K at 164 GPa. A huge upper critical magnetic field value Hc2(0) reaches 223 T at 146 GPa. The small volume expansion of P63/mmc-(La, Al) H10 compared with the binary LaH10 indicates the possible interstitial sites of Al atoms filling into the La-H lattice, instead of forming conventional ternary alloy-based superhydrides. This work provides a new strategy for metastable high-temperature superconductors through the multiple-element system.
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Affiliation(s)
- Su Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, China
| | - Yingcai Qian
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei230031, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, China
| | - Wuhao Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, China
| | - Jianning Guo
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, China
| | - Kexin Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, China
| | - Jinglei Zhang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei230031, China
| | - Huiqiu Yuan
- Center for Correlated Matter, College of Physics, Zhejiang University, Hangzhou 310058, China
| | - Tian Cui
- School of Physical Science and Technology, Ningbo University, Ningbo315211, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, China
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12
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Zheng F, Sun Y, Wang R, Fang Y, Zhang F, Wu S, Lin Q, Wang CZ, Antropov V, Ho KM. Prediction of superconductivity in metallic boron-carbon compounds from 0 to 100 GPa by high-throughput screening. Phys Chem Chem Phys 2023; 25:32594-32601. [PMID: 38009068 DOI: 10.1039/d3cp03844k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Boron-carbon compounds have been shown to have feasible superconductivity. In our earlier paper [Zheng et al., Phys. Rev. B, 2023, 107, 014508], we identified a new conventional superconductor of LiB3C at 100 GPa. Here, we aim to extend the investigation of possible superconductivity in this structural framework by replacing Li atoms with 27 different cations from periods 3, 4, and 5 under pressures ranging from 0 to 100 GPa. Using the high-throughput screening method of zone-center electron-phonon interaction, we found that ternary compounds like CaB3C, SrB3C, TiB3C, and VB3C are promising candidates for superconductivity. The consecutive calculations using the full Brillouin zone confirm that they have a Tc of <31 K at moderate pressures. Our study demonstrates that fast screening of superconductivity by calculating zone-center electron-phonon coupling strength is an effective strategy for high-throughput identification of new superconductors.
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Affiliation(s)
- Feng Zheng
- School of Science, Jimei University, Xiamen 361021, China.
- Department of Physics, OSED, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), Jiujiang Research Institute, Xiamen University, Xiamen 361005, China.
| | - Yang Sun
- Department of Physics, OSED, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), Jiujiang Research Institute, Xiamen University, Xiamen 361005, China.
| | - Renhai Wang
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yimei Fang
- Department of Physics, OSED, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), Jiujiang Research Institute, Xiamen University, Xiamen 361005, China.
| | - Feng Zhang
- Department of Physics, Iowa State University, Ames, Iowa 50011, USA
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, USA
| | - Shunqing Wu
- Department of Physics, OSED, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), Jiujiang Research Institute, Xiamen University, Xiamen 361005, China.
| | - Qiubao Lin
- School of Science, Jimei University, Xiamen 361021, China.
| | - Cai-Zhuang Wang
- Department of Physics, Iowa State University, Ames, Iowa 50011, USA
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, USA
| | - Vladimir Antropov
- Department of Physics, Iowa State University, Ames, Iowa 50011, USA
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, USA
| | - Kai-Ming Ho
- Department of Physics, Iowa State University, Ames, Iowa 50011, USA
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13
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Hu K, Geng Y, Yu J, Gu Y. Crystal structure prediction and non-superconductivity of N-doped LuH 3at near ambient pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:085401. [PMID: 37934039 DOI: 10.1088/1361-648x/ad0a4c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 11/07/2023] [Indexed: 11/08/2023]
Abstract
Lanthanide polyhydrides, which have attracted the attention of researchers, are considered as a potential candidate material for high-temperature superconductivity. Especially, it is reported that N-doped LuH3exhibits near ambient superconductivity recently. It has attracted attention to room temperature superconductivity of ternary Lu-N-H systems at near ambient pressure. Here, we constructed a LuNH3(N-doped LuH3) compound to predict the crystal structural at relatively low pressures. We found a stable ternary LuNH3structure with a tetragonalP4mmphase under 5 GPa. In addition, ourTccalculations show that theP4mmLuNH3structure does not exhibit superconductivity down to 0.3 K at near ambient pressure due to the H atoms hardly contribute to acoustical phonons.
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Affiliation(s)
- Kai Hu
- Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications, School of Physics and Electronics, Hunan University, Changsha 410082, People's Republic of China
| | - Yixing Geng
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, People's Republic of China
| | - Jinqing Yu
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications, School of Physics and Electronics, Hunan University, Changsha 410082, People's Republic of China
| | - Yuqiu Gu
- Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China
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14
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Huang G, Peng D, Luo T, Chen LC, Dalladay-Simpson P, Cao ZY, Gorelli FA, Zhong GH, Lin HQ, Chen XJ. Synthesis of superconducting phase of La 0.5Ce 0.5H 10at high pressures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:075702. [PMID: 37918102 DOI: 10.1088/1361-648x/ad0915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/02/2023] [Indexed: 11/04/2023]
Abstract
Clathrate hydrideFm3-m-LaH10has been proven as the most extraordinary superconductor with the critical temperatureTcabove 250 K upon compression of hundreds of GPa in recent years. A general hope is to reduce the stabilization pressure and maintain the highTcvalue of the specific phase in LaH10. However, strong structural instability distortsFm3-mstructure and leads to a rapid decrease ofTcat low pressures. Here, we investigate the phase stability and superconducting behaviors ofFm3-m-LaH10with enhanced chemical pre-compression through partly replacing La by Ce atoms from both experiments and calculations. For explicitly characterizing the synthesized hydride, we choose lanthanum-cerium alloy with stoichiometry composition of 1:1. X-ray diffraction and Raman scattering measurements reveal the stabilization ofFm3-m-La0.5Ce0.5H10in the pressure range of 140-160 GPa. Superconductivity withTcof 175 ± 2 K at 155 GPa is confirmed with the observation of the zero-resistivity state and supported by the theoretical calculations. These findings provide applicability in the future explorations for a large variety of hydrogen-rich hydrides.
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Affiliation(s)
- Ge Huang
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China
| | - Di Peng
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Tao Luo
- School of Science, Harbin Institute of Technology, Shenzhen 518055, People's Republic of China
| | - Liu-Cheng Chen
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China
- School of Science, Harbin Institute of Technology, Shenzhen 518055, People's Republic of China
| | - Philip Dalladay-Simpson
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China
| | - Zi-Yu Cao
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China
- Center for Quantum Materials and Superconductivity (CQMS) and Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Federico A Gorelli
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China
- National Institute of Optics (INO-CNR) and European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, 50019 Sesto Fiorentino (Florence), Italy
| | - Guo-Hua Zhong
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Shenzhen, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Hai-Qing Lin
- School of Physics, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Xiao-Jia Chen
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston TX 77204, United States of America
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15
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Xu YL, Chen YM, Yan XZ, Huang YB, Zhou XZ, Wu QX, Sheng XW, Kuang FG. First-principles study of the structures and superconductivity of H-S-La systems under high pressure. Phys Chem Chem Phys 2023; 25:29283-29288. [PMID: 37876212 DOI: 10.1039/d3cp03368f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Recent experimental and theoretical studies have shown that a La-H system displays remarkable superconducting properties, and it is also possible to improve the superconducting state by introducing other elements into this system. In this study, we systematically investigated the crystal structures and physical properties of an H-S-La system by using first-principles calculations combined with the CALYPSO structure exploration technique. We predicted four stable stoichiometries containing H2SLa, H3SLa, H4Sla, and H6SLa. These compounds undergo a series of phase transitions under 50-300 GPa. The bonding characters and electronic properties were calculated. It was found that Cm-H2SLa, C2/c-H2SLa, and Cmcm-H6SLa exhibit good metallic nature, which stimulates us to further study their superconducting properties. The calculated superconducting transition temperatures (Tc) of Cm-H2SLa, C2/c-H2Sla, and Cmcm-H6SLa are 15.0 K at 200 GPa, 6.9 K at 300 GPa, and 23.6 K at 300 GPa, respectively.
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Affiliation(s)
- Yin L Xu
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
| | - Yang M Chen
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
| | - Xiao Z Yan
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
| | - Yi B Huang
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
| | - Xing Z Zhou
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
| | - Quan X Wu
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
| | - Xiao W Sheng
- Department of Physics, Anhui Normal University, Wuhu 241000, Anhui, China
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Wuhu 241000, China
| | - Fang G Kuang
- School of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, China
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16
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Ming X, Zhang YJ, Zhu X, Li Q, He C, Liu Y, Huang T, Liu G, Zheng B, Yang H, Sun J, Xi X, Wen HH. Absence of near-ambient superconductivity in LuH 2±xN y. Nature 2023; 620:72-77. [PMID: 37168015 PMCID: PMC10396964 DOI: 10.1038/s41586-023-06162-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/03/2023] [Indexed: 05/13/2023]
Abstract
A recent study demonstrated near-ambient superconductivity in nitrogen-doped lutetium hydride1. This stimulated a worldwide interest in exploring room-temperature superconductivity at low pressures. Here, by using a high-pressure and high-temperature synthesis technique, we have obtained nitrogen-doped lutetium hydride (LuH2±xNy), which has a dark-blue colour and a structure with the space group [Formula: see text] as evidenced by X-ray diffraction. This structure is the same as that reported in ref. 1, with a slight difference in lattice constant. Raman spectroscopy of our samples also showed patterns similar to those observed in ref. 1. Energy-dispersive X-ray spectroscopy confirmed the presence of nitrogen in the samples. We observed a metallic behaviour from 350 K to 2 K at ambient pressure. On applying pressures from 2.1 GPa to 41 GPa, we observed a gradual colour change from dark blue to violet to pink-red. By measuring the resistance at pressures ranging from 0.4 GPa to 40.1 GPa, we observed a progressively improved metallic behaviour; however, superconductivity was not observed above 2 K. Temperature dependence of magnetization at high pressure shows a very weak positive signal between 100 K and 320 K, and the magnetization increases with an increase in magnetic field at 100 K. All of these are not expected for superconductivity above 100 K. Thus, we conclude the absence of near-ambient superconductivity in this nitrogen-doped lutetium hydride at pressures below 40.1 GPa.
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Affiliation(s)
- Xue Ming
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Ying-Jie Zhang
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Xiyu Zhu
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
| | - Qing Li
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
| | - Chengping He
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Yuecong Liu
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Tianheng Huang
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Gan Liu
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Bo Zheng
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Huan Yang
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Jian Sun
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Xiaoxiang Xi
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Hai-Hu Wen
- National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
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17
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Song Y, Bi J, Nakamoto Y, Shimizu K, Liu H, Zou B, Liu G, Wang H, Ma Y. Stoichiometric Ternary Superhydride LaBeH_{8} as a New Template for High-Temperature Superconductivity at 110 K under 80 GPa. PHYSICAL REVIEW LETTERS 2023; 130:266001. [PMID: 37450815 DOI: 10.1103/physrevlett.130.266001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 01/16/2023] [Accepted: 05/18/2023] [Indexed: 07/18/2023]
Abstract
The search for high-temperature superconducting superhydrides has recently moved into a new phase by going beyond extensively probed binary compounds and focusing on ternary ones with vastly expanded material types and configurations for property optimization. Theoretical and experimental works have revealed promising ternary compounds that superconduct at or above room temperature, but it remains a pressing challenge to synthesize stoichiometric ternary compounds with a well-resolved crystal structure that can host high-temperature superconductivity at submegabar pressures. Here, we report on the successful synthesis of ternary LaBeH_{8} obtained via compression in a diamond anvil cell under 110-130 GPa. X-ray diffraction unveils a rocksalt-like structure composing La and BeH_{8} units in the lattice. Transport measurements determined superconductivity with critical temperature T_{c} up to 110 K at 80 GPa, as evidenced by a sharp drop of resistivity to zero and a characteristic shift of T_{c} driven by a magnetic field. Our experiment establishes the first superconductive ternary compound with a resolved crystal structure. These findings raise the prospects of rational development of the class of high-T_{c} superhydrides among ternary compounds, opening greatly expanded and more diverse structural space for exploration and discovery of superhydrides with enhanced high-T_{c} superconductivity.
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Affiliation(s)
- Yinggang Song
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
| | - Jingkai Bi
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
| | - Yuki Nakamoto
- Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Katsuya Shimizu
- Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hanyu Liu
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Bo Zou
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Guangtao Liu
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
| | - Hongbo Wang
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Yanming Ma
- Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
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18
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Morgan HWT, Alexandrova AN. Structures of LaH 10, EuH 9, and UH 8 superhydrides rationalized by electron counting and Jahn-Teller distortions in a covalent cluster model. Chem Sci 2023; 14:6679-6687. [PMID: 37350837 PMCID: PMC10283509 DOI: 10.1039/d3sc00900a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/30/2023] [Indexed: 06/24/2023] Open
Abstract
The superconducting hydrides LaH10, EuH9 and UH8 are studied using chemically intuitive bonding analysis of periodic and molecular models. We find trends in the crystallographic and electronic structures of the materials by focusing on chemically meaningful building blocks in the predicted H sublattices. Atomic charge calculations, using two complementary techniques, allow us to assign oxidation states to the metals and divide the H sublattice into neutral and anionic components. Cubic [H8]q- clusters are an important structural motif, and molecular orbital analysis of this cluster in isolation shows the crystal structures to be consistent with our oxidation state assignments. Crystal orbital Hamilton population analysis confirms the applicability of the cluster model to the periodic electronic structure. A Jahn-Teller distortion predicted by MO analysis rationalises the distortion observed in a prior study of EuH9. The impact of this distortion on superconductivity is determined, and implications for crystal structure prediction in other metal-hydrogen systems are discussed. Additionally, the performance of electronic structure analysis methods at high pressures are tested and recommendations for future studies are given. These results demonstrate the value of simple bonding models in rationalizing chemical structures under extreme conditions.
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Affiliation(s)
- Harry W T Morgan
- Department of Chemistry and Biochemistry, University of California Los Angeles California 90095-1569 USA
| | - Anastassia N Alexandrova
- Department of Chemistry and Biochemistry, University of California Los Angeles California 90095-1569 USA
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19
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Chen W, Huang X, Semenok DV, Chen S, Zhou D, Zhang K, Oganov AR, Cui T. Enhancement of superconducting properties in the La-Ce-H system at moderate pressures. Nat Commun 2023; 14:2660. [PMID: 37160883 PMCID: PMC10170082 DOI: 10.1038/s41467-023-38254-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 04/17/2023] [Indexed: 05/11/2023] Open
Abstract
Ternary hydrides are regarded as an important platform for exploring high-temperature superconductivity at relatively low pressures. Here, we successfully synthesized the hcp-(La,Ce)H9-10 at 113 GPa with the initial La/Ce ratio close to 3:1. The high-temperature superconductivity was strikingly observed at 176 K and 100 GPa with the extrapolated upper critical field Hc2(0) reaching 235 T. We also studied the binary La-H system for comparison, which exhibited a Tc of 103 K at 78 GPa. The Tc and Hc2(0) of the La-Ce-H are respectively enhanced by over 80 K and 100 T with respect to the binary La-H and Ce-H components. The experimental results and theoretical calculations indicate that the formation of the solid solution contributes not only to enhanced stability but also to superior superconducting properties. These results show how better superconductors can be engineered in the new hydrides by large addition of alloy-forming elements.
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Affiliation(s)
- Wuhao Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
| | - Dmitrii V Semenok
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, China
| | - Su Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Di Zhou
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, China
| | - Kexin Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Bolshoy Boulevard 30, bldg. 1, Moscow, 121205, Russia
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
- School of Physical Science and Technology, Ningbo University, Ningbo, 315211, China.
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20
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Zhao X, Shan P, Wang N, Li Y, Xu Y, Cheng J. Pressure tuning of optical reflectivity in LuH 2. Sci Bull (Beijing) 2023; 68:883-886. [PMID: 37061411 DOI: 10.1016/j.scib.2023.04.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/02/2023] [Accepted: 04/04/2023] [Indexed: 04/17/2023]
Affiliation(s)
- Xuan Zhao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Pengfei Shan
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Ningning Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yunliang Li
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yang Xu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China.
| | - Jinguang Cheng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China.
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21
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Wang H, Salzbrenner PT, Errea I, Peng F, Lu Z, Liu H, Zhu L, Pickard CJ, Yao Y. Quantum structural fluxion in superconducting lanthanum polyhydride. Nat Commun 2023; 14:1674. [PMID: 36966129 PMCID: PMC10039887 DOI: 10.1038/s41467-023-37295-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 03/09/2023] [Indexed: 03/27/2023] Open
Abstract
The discovery of 250-kelvin superconducting lanthanum polyhydride under high pressure marked a significant advance toward the realization of a room-temperature superconductor. X-ray diffraction (XRD) studies reveal a nonstoichiometric LaH9.6 or LaH10±δ polyhydride responsible for the superconductivity, which in the literature is commonly treated as LaH10 without accounting for stoichiometric defects. Here, we discover significant nuclear quantum effects (NQE) in this polyhydride, and demonstrate that a minor amount of stoichiometric defects will cause quantum proton diffusion in the otherwise rigid lanthanum lattice in the ground state. The diffusion coefficient reaches ~10-7 cm2/s in LaH9.63 at 150 gigapascals and 240 kelvin, approaching the upper bound value of interstitial hydrides at comparable temperatures. A puzzling phenomenon observed in previous experiments, the positive pressure dependence of the superconducting critical temperature Tc below 150 gigapascals, is explained by a modulation of the electronic structure due to a premature distortion of the hydrogen lattice in this quantum fluxional structure upon decompression, and resulting changes of the electron-phonon coupling. This finding suggests the coexistence of the quantum proton fluxion and hydrogen-induced superconductivity in this lanthanum polyhydride, and leads to an understanding of the structural nature and superconductivity of nonstoichiomectric hydrogen-rich materials.
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Affiliation(s)
- Hui Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), School of Physics and Electronic Engineering, Harbin Normal University, 150025, Harbin, China.
- International Center for Computational Method & Software, College of Physics, Jilin University, 130012, Changchun, China.
| | - Pascal T Salzbrenner
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
| | - Ion Errea
- Fisika Aplikatua Saila, Gipuzkoako Ingeniaritza Eskola, University of the Basque Country (UPV/EHU), Europa Plaza 1, 20018, Donostia/San Sebastián, Spain
- Centro de Física de Materiales (CSIC-UPV/EHU), Manuel de Lardizabal Pasealekua 5, 20018, Donostia/San Sebastián, Spain
- Donostia International Physics Center (DIPC), Manuel de Lardizabal Pasealekua 4, 20018, Donostia/San Sebastián, Spain
| | - Feng Peng
- College of Physics and Electronic Information, Luoyang Normal University, 471022, Luoyang, P. R. China
| | - Ziheng Lu
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
| | - Hanyu Liu
- International Center for Computational Method & Software, College of Physics, Jilin University, 130012, Changchun, China
- State Key Laboratory of Superhard Materials and International Center of Future Science, Jilin University, 130012, Changchun, China
| | - Li Zhu
- Department of Physics, Rutgers University, Newark, NJ, 07102, USA
| | - Chris J Pickard
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
- Advanced Institute for Materials Research, Tohoku University 2-1-1 Katahira, Aoba, Sendai, 980-8577, Japan
| | - Yansun Yao
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
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22
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Symmetry of Identical Particles, Modern Achievements in the Pauli Exclusion Principle, in Superconductivity and in Some Other Phenomena. Symmetry (Basel) 2023. [DOI: 10.3390/sym15030701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023] Open
Abstract
In this review, the modern achievements in studies of the Pauli exclusion principle (PEP) and the properties of the identical particle systems when PEP is not fulfilled are discussed. The validity of conception of the spin in the framework of density functional theory (DFT) approaches is analyzed. The modern state of the recently discovered Fe-based superconductors is discussed in detail. These materials belong to the paramagnetic semimetal family and become superconductors upon doping. Recently, in 2020, room-temperature superconductivity was realized. However, from the following discussion in the SC community, it was not evident that the results of room-temperature superconductivity have been repeated by other laboratories. Thus, the question “is room temperature really achieved?” is still open. In the concluding remarks, we present the explanation of why the PEP limitations on the symmetry of identical particles system exist in nature, and following from it, some important consequences.
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23
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Liu M, Cui W, Shi J, Hao J, Li Y. Superconducting H 7 chain in gallium hydrides at high pressure. Phys Chem Chem Phys 2023; 25:7223-7228. [PMID: 36846966 DOI: 10.1039/d2cp05690a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Pressure-stabilized hydrides have potential as an outstanding reservoir for high-temperature (Tc) superconductors. We undertook a systematic study of crystal structures and superconducting properties of gallium hydrides using an advanced structure-search method together with first-principles calculations. We identified an unconventional stoichiometric GaH7 gallium hydride that is thermodynamically stable at pressures above 247 GPa. Interestingly, the H atoms are clustered to form a unique H7 chain intercalating the Ga framework. Further calculations show a high estimated Tc above 100 K at 200-300 GPa for GaH7, closely related to the strong coupling between electrons of Ga and H atoms, and phonon vibrations of H7 chains. Our work provides an example of exploration for diverse superconducting hydrogen motifs under high pressure, and may stimulate further experimental syntheses.
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Affiliation(s)
- Meixu Liu
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
| | - Wenwen Cui
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
| | - Jingming Shi
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
| | - Jian Hao
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
| | - Yinwei Li
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
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24
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Dasenbrock-Gammon N, Snider E, McBride R, Pasan H, Durkee D, Khalvashi-Sutter N, Munasinghe S, Dissanayake SE, Lawler KV, Salamat A, Dias RP. Evidence of near-ambient superconductivity in a N-doped lutetium hydride. Nature 2023; 615:244-250. [PMID: 36890373 DOI: 10.1038/s41586-023-05742-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 01/18/2023] [Indexed: 03/10/2023]
Abstract
The absence of electrical resistance exhibited by superconducting materials would have enormous potential for applications if it existed at ambient temperature and pressure conditions. Despite decades of intense research efforts, such a state has yet to be realized1,2. At ambient pressures, cuprates are the material class exhibiting superconductivity to the highest critical superconducting transition temperatures (Tc), up to about 133 K (refs. 3-5). Over the past decade, high-pressure 'chemical precompression'6,7 of hydrogen-dominant alloys has led the search for high-temperature superconductivity, with demonstrated Tc approaching the freezing point of water in binary hydrides at megabar pressures8-13. Ternary hydrogen-rich compounds, such as carbonaceous sulfur hydride, offer an even larger chemical space to potentially improve the properties of superconducting hydrides14-21. Here we report evidence of superconductivity on a nitrogen-doped lutetium hydride with a maximum Tc of 294 K at 10 kbar, that is, superconductivity at room temperature and near-ambient pressures. The compound was synthesized under high-pressure high-temperature conditions and then-after full recoverability-its material and superconducting properties were examined along compression pathways. These include temperature-dependent resistance with and without an applied magnetic field, the magnetization (M) versus magnetic field (H) curve, a.c. and d.c. magnetic susceptibility, as well as heat-capacity measurements. X-ray diffraction (XRD), energy-dispersive X-ray (EDX) and theoretical simulations provide some insight into the stoichiometry of the synthesized material. Nevertheless, further experiments and simulations are needed to determine the exact stoichiometry of hydrogen and nitrogen, and their respective atomistic positions, in a greater effort to further understand the superconducting state of the material.
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Affiliation(s)
| | - Elliot Snider
- Department of Mechanical Engineering, School of Engineering and Applied Sciences, University of Rochester, Rochester, NY, USA
| | - Raymond McBride
- Department of Mechanical Engineering, School of Engineering and Applied Sciences, University of Rochester, Rochester, NY, USA
| | - Hiranya Pasan
- Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA
| | - Dylan Durkee
- Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA
| | - Nugzari Khalvashi-Sutter
- Department of Mechanical Engineering, School of Engineering and Applied Sciences, University of Rochester, Rochester, NY, USA
| | - Sasanka Munasinghe
- Department of Mechanical Engineering, School of Engineering and Applied Sciences, University of Rochester, Rochester, NY, USA
| | - Sachith E Dissanayake
- Department of Mechanical Engineering, School of Engineering and Applied Sciences, University of Rochester, Rochester, NY, USA
| | | | | | - Ranga P Dias
- Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.
- Department of Mechanical Engineering, School of Engineering and Applied Sciences, University of Rochester, Rochester, NY, USA.
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25
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Takahashi K, Nakamura T, Akutagawa T. Dynamic supramolecular cations in conductive and magnetic [Ni(dmit)2] crystals. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Zhang J, Wang Y, Tang L, Duan J, Wang J, Li S, Ju M, Sun W, Jin Y, Zhang C. Exploring high pressure structural transformations, electronic properties and superconducting properties of MH2 (M = Nb, Ta). ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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27
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Bokhimi X. Effect of Pressure on the Distribution of Electrons in a Cluster of H 2S. ACS OMEGA 2022; 7:42499-42504. [PMID: 36440145 PMCID: PMC9685773 DOI: 10.1021/acsomega.2c05726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
We carry out a theoretical study of the effect of pressure on the atomic and electronic distribution of a cluster made of 155 H2S molecules. The pressure was modeled by bringing the cluster into a spherical container made of 500 helium atoms and reducing the diameter of the container. We did ab initio molecular calculations using DFT. At the lowest pressure, the S-H-S angle between two neighboring H2S molecules has a distribution with a mean value of 167.1°. This angle will be shorter as pressure increases, reaching a distribution with a mean value of 125.5° at the highest pressure. Changes in this angle result from a strong S-S interaction, displacing the H atoms from the line joining the sulfur atoms. This rearrangement of the atomic distribution generates hydrogen-rich spatial regions. We analyzed the evolution of Mulliken charges on S and H atoms in the cluster with pressure, finding that electrons move from S to H atoms, suggesting that these hydrogen-rich regions should be responsible for the electrical conductivity and, consequently, also for the superconductivity in solid H2S under pressure.
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28
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High-pressure synthesis of seven lanthanum hydrides with a significant variability of hydrogen content. Nat Commun 2022; 13:6987. [DOI: 10.1038/s41467-022-34755-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 11/04/2022] [Indexed: 11/18/2022] Open
Abstract
AbstractThe lanthanum-hydrogen system has attracted significant attention following the report of superconductivity in LaH10 at near-ambient temperatures and high pressures. Phases other than LaH10 are suspected to be synthesized based on both powder X-ray diffraction and resistivity data, although they have not yet been identified. Here, we present the results of our single-crystal X-ray diffraction studies on this system, supported by density functional theory calculations, which reveal an unexpected chemical and structural diversity of lanthanum hydrides synthesized in the range of 50 to 180 GPa. Seven lanthanum hydrides were produced, LaH3, LaH~4, LaH4+δ, La4H23, LaH6+δ, LaH9+δ, and LaH10+δ, and the atomic coordinates of lanthanum in their structures determined. The regularities in rare-earth element hydrides unveiled here provide clues to guide the search for other synthesizable hydrides and candidate high-temperature superconductors. The hydrogen content variability in lanthanum hydrides and the samples’ phase heterogeneity underline the challenges related to assessing potentially superconducting phases and the nature of electronic transitions in high-pressure hydrides.
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29
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Zhao W, Song H, Liu Z, Du M, Zhang Z, Liu Z, Jiang Q, Chen L, Duan D, Cui T. Pressure Induced Clathrate Hydrogen-Rich Superconductors KH 20 and KH 30. Inorg Chem 2022; 61:18112-18118. [DOI: 10.1021/acs.inorgchem.2c02686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Wendi Zhao
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Hao Song
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Zhao Liu
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Mingyang Du
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
| | - Zihan Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
| | - Zhengtao Liu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
| | - Qiwen Jiang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
| | - Ling Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
| | - Tian Cui
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People’s Republic of China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
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30
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Sun Y, Sun S, Zhong X, Liu H. Prediction for high superconducting ternary hydrides below megabar pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:505404. [PMID: 36261034 DOI: 10.1088/1361-648x/ac9bba] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
The recent findings of high-temperature hydrides ushered a new era of superconductivity research under high pressure. However, the stable pressure for these remarkable hydrides remains extremely high. In this work, we performed the extensive simulations on a series of hydrides with the prototype structure of UH8and UH7. Our results indicate several compounds possess superconducting critical temperature (Tc) above liquid nitrogen temperature below 100 GPa, such as CeBeH8and ThBeH8that are dynamical stable with aTcof 201 K at 30 GPa and aTcof 98 K at 10 GPa, respectively. Further formation enthalpy calculations suggest that thermodynamical stable pressure of CeBeH8and ThBeH8compounds is above 50 GPa and 88 GPa with respect to binary compounds and solid elements. Moreover, we also found that ThBeH7could be dynamically stable down to 20 GPa with aTcof 70 K. Our further simulations suggested this newly predicted ThBeH7is thermodynamically stable above pressure of 33 GPa with respect to binary compounds and solid elements. The present results shed light on future design and discovery of high-temperature superconductor at moderate pressure.
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Affiliation(s)
- Yao Sun
- International Center for Computational Method & Software and State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Shuai Sun
- Engineering Training Center, Jilin University, Changchun, Jilin, People's Republic of China
| | - Xin Zhong
- International Center for Computational Method & Software and State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Hanyu Liu
- International Center for Computational Method & Software and State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, People's Republic of China
- International Center of Future Science, Jilin University, Changchun 130012, People's Republic of China
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31
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Giant enhancement of superconducting critical temperature in substitutional alloy (La,Ce)H 9. Nat Commun 2022; 13:5952. [PMID: 36216828 PMCID: PMC9551097 DOI: 10.1038/s41467-022-33743-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/22/2022] [Indexed: 11/28/2022] Open
Abstract
A sharp focus of current research on superconducting superhydrides is to raise their critical temperature Tc at moderate pressures. Here, we report a discovery of giant enhancement of Tc in CeH9 obtained via random substitution of half Ce by La, leading to equal-atomic (La,Ce)H9 alloy stabilized by maximum configurational entropy, containing the LaH9 unit that is unstable in pure compound form. The synthesized (La,Ce)H9 alloy exhibits Tc of 148–178 K in the pressure range of 97–172 GPa, representing up to 80% enhancement of Tc compared to pure CeH9 and showcasing the highest Tc at sub-megabar pressure among the known superhydrides. This work demonstrates substitutional alloying as a highly effective enabling tool for substantially enhancing Tc via atypical compositional modulation inside suitably selected host crystal. This optimal substitutional alloying approach opens a promising avenue for synthesis of high-entropy multinary superhydrides that may exhibit further increased Tc at even lower pressures. Superconductivity was recently discovered in the clathrate hydride CeH9 with superconducting temperature (Tc) of 57 K at pressures below 1 megabar. Here, the authors show that Tc can be increased to 148 K in the substitutional alloy (La,Ce)H9, while maintaining a pressure below 1 megabar.
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32
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Semenok DV, Troyan IA, Sadakov AV, Zhou D, Galasso M, Kvashnin AG, Ivanova AG, Kruglov IA, Bykov AA, Terent'ev KY, Cherepakhin AV, Sobolevskiy OA, Pervakov KS, Seregin AY, Helm T, Förster T, Grockowiak AD, Tozer SW, Nakamoto Y, Shimizu K, Pudalov VM, Lyubutin IS, Oganov AR. Effect of Magnetic Impurities on Superconductivity in LaH 10. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2204038. [PMID: 35829689 DOI: 10.1002/adma.202204038] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/17/2022] [Indexed: 06/15/2023]
Abstract
Polyhydrides are a novel class of superconducting materials with extremely high critical parameters, which is very promising for sensor applications. On the other hand, a complete experimental study of the best so far known superconductor, lanthanum superhydride LaH10 , encounters a serious complication because of the large upper critical magnetic field HC2 (0), exceeding 120-160 T. It is found that partial replacement of La atoms by magnetic Nd atoms results in significant suppression of superconductivity in LaH10 : each at% of Nd causes a decrease in TC by 10-11 K, helping to control the critical parameters of this compound. Strong pulsed magnetic fields up to 68 T are used to study the Hall effect, magnetoresistance, and the magnetic phase diagram of ternary metal polyhydrides for the first time. Surprisingly, (La,Nd)H10 demonstrates completely linear HC2 (T) ∝ |T - TC |, which calls into question the applicability of the Werthamer-Helfand-Hohenberg model for polyhydrides. The suppression of superconductivity in LaH10 by magnetic Nd atoms and the robustness of TC with respect to nonmagnetic impurities (e.g., Y, Al, C) under Anderson's theorem gives new experimental evidence of the isotropic (s-wave) character of conventional electron-phonon pairing in lanthanum decahydride.
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Affiliation(s)
- Dmitrii V Semenok
- Materials Discovery Laboratory, Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Ivan A Troyan
- Shubnikov Institute of Crystallography, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, 59 Leninsky Prospekt, Moscow, 119333, Russia
| | - Andrey V Sadakov
- V.L. Ginzburg Center for High-Temperature Superconductivity and Quantum Materials, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Di Zhou
- Materials Discovery Laboratory, Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Michele Galasso
- Materials Discovery Laboratory, Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Alexander G Kvashnin
- Materials Discovery Laboratory, Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Anna G Ivanova
- Shubnikov Institute of Crystallography, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, 59 Leninsky Prospekt, Moscow, 119333, Russia
| | - Ivan A Kruglov
- Center for Fundamental and Applied Research, Dukhov Research Institute of Automatics (VNIIA), st. Sushchevskaya, 22, Moscow, 127055, Russia
- Laboratory of Computational Materials Discovery, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny, 141700, Russia
| | - Alexey A Bykov
- Crystal Physics Laboratory, NRC "Kurchatov Institute" PNPI, 1, mkr. Orlova roshcha, Gatchina, 188300, Russia
| | - Konstantin Y Terent'ev
- Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russia
| | - Alexander V Cherepakhin
- Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russia
| | - Oleg A Sobolevskiy
- V.L. Ginzburg Center for High-Temperature Superconductivity and Quantum Materials, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Kirill S Pervakov
- V.L. Ginzburg Center for High-Temperature Superconductivity and Quantum Materials, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Alexey Yu Seregin
- Shubnikov Institute of Crystallography, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, 59 Leninsky Prospekt, Moscow, 119333, Russia
- Synchrotron radiation source "KISI-Kurchatov", National Research Center "Kurchatov Institute", Moscow, 123182, Russia
| | - Toni Helm
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01328, Dresden, Germany
| | - Tobias Förster
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01328, Dresden, Germany
| | - Audrey D Grockowiak
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA
- Brazilian Synchrotron Light Laboratory (LNLS/Sirius), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, 13083-100, Brazil
| | - Stanley W Tozer
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA
| | - Yuki Nakamoto
- KYOKUGEN, Graduate School of Engineering Science, Osaka University, Machikaneyamacho 1-3, Toyonaka, Osaka, 560-8531, Japan
| | - Katsuya Shimizu
- KYOKUGEN, Graduate School of Engineering Science, Osaka University, Machikaneyamacho 1-3, Toyonaka, Osaka, 560-8531, Japan
| | - Vladimir M Pudalov
- V.L. Ginzburg Center for High-Temperature Superconductivity and Quantum Materials, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia
- HSE Tikhonov Moscow Institute of Electronics and Mathematics, National Research University Higher School of Economics, 20 Myasnitskaya ulitsa, Moscow, 101000, Russia
| | - Igor S Lyubutin
- Shubnikov Institute of Crystallography, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, 59 Leninsky Prospekt, Moscow, 119333, Russia
| | - Artem R Oganov
- Materials Discovery Laboratory, Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
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33
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Hilleke KP, Zurek E. Rational Design of Superconducting Metal Hydrides via Chemical Pressure Tuning**. Angew Chem Int Ed Engl 2022; 61:e202207589. [DOI: 10.1002/anie.202207589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Katerina P. Hilleke
- Department of Chemistry State University of New York at Buffalo Buffalo NY 14260-3000 USA
| | - Eva Zurek
- Department of Chemistry State University of New York at Buffalo Buffalo NY 14260-3000 USA
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34
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Dasenbrock-Gammon N, McBride R, Yoo G, Dissanayake S, Dias R. Second harmonic AC calorimetry technique within a diamond anvil cell. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:093901. [PMID: 36182513 DOI: 10.1063/5.0104705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/29/2022] [Indexed: 06/16/2023]
Abstract
Tuning the energy density of matter at high pressures gives rise to exotic and often unprecedented properties, e.g., structural transitions, insulator-metal transitions, valence fluctuations, topological order, and the emergence of superconductivity. The study of specific heat has long been used to characterize these kinds of transitions, but their application to the diamond anvil cell (DAC) environment has proved challenging. Limited work has been done on the measurement of specific heat within DACs, in part due to the difficult experimental setup. To this end, we have developed a novel method for the measurement of specific heat within a DAC that is independent of the DAC design and is, therefore, readily compatible with any DACs already performing high pressure resistance measurements. As a proof-of-concept, specific heat measurements of the MgB2 superconductor were performed, showing a clear anomaly at the transition temperature (Tc), indicative of bulk superconductivity. This technique allows for specific heat measurements at higher pressures than previously possible.
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Affiliation(s)
| | - Raymond McBride
- Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Gyeongjae Yoo
- Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Sachith Dissanayake
- Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Ranga Dias
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
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35
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Smith GA, Collings IE, Snider E, Smith D, Petitgirard S, Smith JS, White M, Jones E, Ellison P, Lawler KV, Dias RP, Salamat A. Carbon content drives high temperature superconductivity in a carbonaceous sulfur hydride below 100 GPa. Chem Commun (Camb) 2022; 58:9064-9067. [PMID: 35837875 DOI: 10.1039/d2cc03170a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a previously unobserved superconducting state of the photosynthesized carbonaceous sulfur hydride (C-S-H) system with a maximum TC of 191(1) K below 100 GPa. The properties of C-S-H are dependent on carbon content, and X-ray diffraction and simulations reveal the system remains molecular-like up to 100 GPa.
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Affiliation(s)
- G Alexander Smith
- Nevada Extreme Conditions Laboratory, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA.
- Department of Chemistry & Biochemistry, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA
| | - Ines E Collings
- Centre for X-ray Analytics, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstraße 129, 8600 Dübendorf, Switzerland
| | - Elliot Snider
- Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Dean Smith
- Nevada Extreme Conditions Laboratory, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA.
| | | | - Jesse S Smith
- HPCAT, X-ray Science Division, Argonne National Laboratory, Illinois 60439, USA
| | - Melanie White
- Nevada Extreme Conditions Laboratory, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA.
- Department of Physics & Astronomy, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA
| | - Elyse Jones
- Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Paul Ellison
- Department of Physics & Astronomy, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA
| | - Keith V Lawler
- Nevada Extreme Conditions Laboratory, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA.
| | - Ranga P Dias
- Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
- Department of Physics & Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - Ashkan Salamat
- Nevada Extreme Conditions Laboratory, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA.
- Department of Physics & Astronomy, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, USA
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36
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Hilleke K, Zurek E. Rational Design of Superconducting Metal Hydrides via Chemical Pressure Tuning. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Katerina Hilleke
- State University of New York at Buffalo: University at Buffalo Department of Chemistry 359 Natural Sciences ComplexUniversity at Buffalo, North Campus 14260-3000 Buffalo UNITED STATES
| | - Eva Zurek
- University at Buffalo, State University of New York Department of Chemistry 331 Natural Sciences Complex 14260 Buffalo UNITED STATES
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37
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Zhong X, Sun Y, Iitaka T, Xu M, Liu H, Hemley RJ, Chen C, Ma Y. Prediction of Above-Room-Temperature Superconductivity in Lanthanide/Actinide Extreme Superhydrides. J Am Chem Soc 2022; 144:13394-13400. [PMID: 35820372 DOI: 10.1021/jacs.2c05834] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Achieving room-temperature superconductivity has been an enduring scientific pursuit driven by broad fundamental interest and enticing potential applications. The recent discovery of high-pressure clathrate superhydride LaH10 with superconducting critical temperatures (Tc) of 250-260 K made it tantalizingly close to realizing this long-sought goal. Here, we report a remarkable finding based on an advanced crystal structure search method of a new class of extremely hydrogen-rich clathrate superhydride MH18 (M: rare-earth/actinide atom) stoichiometric compounds stabilized at an experimentally accessible pressure of 350 GPa. These compounds are predicted to host Tc up to 330 K, which is well above room temperature. The bonding and electronic properties of these MH18 clathrate superhydrides closely resemble those of atomic metallic hydrogen, giving rise to the highest Tc hitherto found in a thermodynamically stable hydride compound. An in-depth study of these extreme superhydrides offers insights for elucidating phonon-mediated superconductivity above room temperature in hydrogen-rich and other low-Z materials.
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Affiliation(s)
- Xin Zhong
- State Key Laboratory of Superhard Materials and International Center for Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China.,Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, College of Physics, Jilin Normal University, Changchun 130103, China
| | - Ying Sun
- State Key Laboratory of Superhard Materials and International Center for Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Toshiaki Iitaka
- Discrete Event Simulation Research Team, RIKEN Center for Computational Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Meiling Xu
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Hanyu Liu
- State Key Laboratory of Superhard Materials and International Center for Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China.,International Center of Future Science, Jilin University, Changchun 130012, China
| | - Russell J Hemley
- Departments of Physics, Chemistry, and Earth and Environmental Sciences, University of Illinois Chicago, Chicago, Illinois 60607, United States
| | - Changfeng Chen
- Department of Physics and Astronomy, University of Nevada, Las Vegas, Nevada 89154, United States
| | - Yanming Ma
- State Key Laboratory of Superhard Materials and International Center for Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China.,International Center of Future Science, Jilin University, Changchun 130012, China
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38
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Semenok DV, Chen W, Huang X, Zhou D, Kruglov IA, Mazitov AB, Galasso M, Tantardini C, Gonze X, Kvashnin AG, Oganov AR, Cui T. Sr-Doped Superionic Hydrogen Glass: Synthesis and Properties of SrH 22. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200924. [PMID: 35451134 DOI: 10.1002/adma.202200924] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/04/2022] [Indexed: 06/14/2023]
Abstract
Recently, several research groups announced reaching the point of metallization of hydrogen above 400 GPa. Despite notable progress, detecting superconductivity in compressed hydrogen remains an unsolved problem. Following the mainstream of extensive investigations of compressed metal polyhydrides, here small doping of molecular hydrogen by strontium is demonstrated to lead to a dramatic reduction in the metallization pressure to ≈200 GPa. Studying the high-pressure chemistry of the Sr-H system, the formation of several new phases is observed: C2/m-Sr3 H13 , pseudocubic SrH6 , SrH9 with cubic F 4 ¯ 3 m $F\bar{4}3m$ -Sr sublattice, and pseudo tetragonal superionic P1-SrH22 , the metal hydride with the highest hydrogen content (96 at%) discovered so far. High diffusion coefficients of hydrogen in the latter phase DH = 0.2-2.1 × 10-9 m2 s-1 indicate an amorphous state of the H-sublattice, whereas the strontium sublattice remains solid. Unlike Ca and Y, strontium forms molecular semiconducting polyhydrides, whereas calcium and yttrium polyhydrides are high-TC superconductors with an atomic H sublattice. The discovered SrH22 , a kind of hydrogen sponge, opens a new class of materials with ultrahigh content of hydrogen.
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Affiliation(s)
- Dmitrii V Semenok
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Wuhao Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Di Zhou
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Ivan A Kruglov
- Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia
- Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny, 141700, Russia
| | - Arslan B Mazitov
- Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia
- Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny, 141700, Russia
| | - Michele Galasso
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Christian Tantardini
- UiT The Arctic University of Norway, PO Box 6050 Langnes, Troms, N-9037, Norway
- Institute of Solid State Chemistry and Mechanochemistry SB RAS, Novosibirsk, 630128, Russian Federation
| | - Xavier Gonze
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
- European Theoretical Spectroscopy Facility, Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Chemin des étoiles 8, bte L07.03.01, Louvain-la-Neuve, B-1348, Belgium
| | - Alexander G Kvashnin
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard, 30/1, Moscow, 121205, Russia
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
- School of Physical Science and Technology, Ningbo University, Ningbo, 315211, China
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39
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Yang K, Sun H, Chen H, Chen L, Li B, Lu W. Stable structures and superconducting properties of Ca-La-H compounds under pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:355401. [PMID: 35714608 DOI: 10.1088/1361-648x/ac79ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/17/2022] [Indexed: 06/15/2023]
Abstract
The calcium hydrides and lanthanum hydrides under high pressures have been reported to have good superconducting properties with high-TC. In this work, the structures and superconductivities of Ca-La-H ternary hydrides have been studied by genetic algorithm and density functional theory calculations. Our results show that at the pressure range of 100-300 GPa, the most stable structure of CaLaH12has aCmmmsymmetry, in which there is a H24hydrogen cage. It can be expected to have high possibility to be synthesized due to its large stability. Furthermore, the predictedTCof theCmmm-CaLaH12structure is about 140 K at 150 GPa, and when the pressure decreases to 30 GPa, the CaLaH12structure with aC2/msymmetry has a predictedTCof about 49 K. The CaLaH12is suggested to be a stable good superconductor with large stability and performs well at relatively low pressures.
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Affiliation(s)
- KaiPing Yang
- College of Physics, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
| | - HuiJuan Sun
- College of Physics, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
| | - HaiLiang Chen
- College of Physics, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
| | - LingYan Chen
- College of Physics, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
| | - BingYu Li
- College of Physics, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
| | - WenCai Lu
- College of Physics, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
- Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin 130021, People's Republic of China
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40
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Jaroń T, Ying J, Tkacz M, Grzelak A, Prakapenka VB, Struzhkin VV, Grochala W. Synthesis, Structure, and Electric Conductivity of Higher Hydrides of Ytterbium at High Pressure. Inorg Chem 2022; 61:8694-8702. [PMID: 35642313 PMCID: PMC9490838 DOI: 10.1021/acs.inorgchem.2c00405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
While most of the
rare-earth metals readily form trihydrides, due
to increased stability of the filled 4f electronic shell for Yb(II),
only YbH2.67, formally corresponding to YbII(YbIIIH4)2 (or Yb3H8), remains the highest hydride of ytterbium. Utilizing the
diamond anvil cell methodology and synchrotron powder X-ray diffraction,
we have attempted to push this limit further via hydrogenation
of metallic Yb and Yb3H8. Compression of the
latter has also been investigated in a neutral pressure-transmitting
medium (PTM). While the in situ heating of Yb facilitates
the formation of YbH2+x hydrides, we have
not observed clear qualitative differences between the systems compressed
in H2 and He or Ne PTM. In all of these cases, a sequence
of phase transitions occurred within ca. 13–18
GPa (P3̅1m–I4/m phase) and around 27 GPa (to the I4/mmm phase). The molecular volume of
the systems compressed in H2 PTM is ca. 1.5% larger than of those compressed in inert gases, suggesting
a small hydrogen uptake. Nevertheless, hydrogenation toward YbH3 is incomplete, and polyhydrides do not form up to the highest
pressure studied here (ca. 75 GPa). As pointed out
by electronic transport measurements, the mixed-valence Yb3H8 retains its semiconducting character up to >50 GPa,
although the very low remnant activation energy of conduction (<5
meV) suggests that metallization under further compression should
be achievable. Finally, we provide a theoretical description of a
hypothetical stoichiometric YbH3. Hydrogenation of Yb and Yb3H8 has
been attempted under high pressure (≤75 GPa); the latter compound
has also been investigated in Ne and He. The same sequence of phase
transitions observed in all of these systems, with only minor differences
in molar volume (1.5%), indicates that the limiting composition remains
not far from YbH2.67. The latter retains its semiconducting
character up to >50 GPa, with a very low remnant activation energy
of conduction (<5 meV).
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Affiliation(s)
- Tomasz Jaroń
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland.,Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, District of Columbia 20015, United States.,Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-089 Warsaw, Poland
| | - Jianjun Ying
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, District of Columbia 20015, United States.,HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, United States
| | - Marek Tkacz
- Institute for Physical Chemistry, Polish Academy of Science, 01-224 Warsaw, Poland
| | - Adam Grzelak
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
| | - Vitali B Prakapenka
- Consortium for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, United States
| | - Viktor V Struzhkin
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, District of Columbia 20015, United States.,Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Wojciech Grochala
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
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41
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Affiliation(s)
- Josiah Roberts
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
| | - Eva Zurek
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
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42
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Charraud JB, Geneste G, Torrent M, Maillet JB. Machine learning accelerated random structure searching: Application to yttrium superhydrides. J Chem Phys 2022; 156:204102. [DOI: 10.1063/5.0085173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The search for new superhydrides, promising materials for both hydrogen storage and high temperature superconductivity, made great progress, thanks to atomistic simulations and Crystal Structure Prediction (CSP) algorithms. When they are combined with Density Functional Theory (DFT), these methods are highly reliable and often match a great part of the experimental results. However, systems of increasing complexity (number of atoms and chemical species) become rapidly challenging as the number of minima to explore grows exponentially with the number of degrees of freedom in the simulation cell. An efficient sampling strategy preserving a sustainable computational cost then remains to be found. We propose such a strategy based on an active-learning process where machine learning potentials and DFT simulations are jointly used, opening the way to the discovery of complex structures. As a proof of concept, this method is applied to the exploration of tin crystal structures under various pressures. We showed that the α phase, not included in the learning process, is correctly retrieved, despite its singular nature of bonding. Moreover, all the expected phases are correctly predicted under pressure (20 and 100 GPa), suggesting the high transferability of our approach. The method has then been applied to the search of yttrium superhydrides (YH x) crystal structures under pressure. The YH6 structure of space group Im-3m is successfully retrieved. However, the exploration of more complex systems leads to the appearance of a large number of structures. The selection of the relevant ones to be included in the active learning process is performed through the analysis of atomic environments and the clustering algorithm. Finally, a metric involving a distance based on x-ray spectra is introduced, which guides the structural search toward experimentally relevant structures. The global process (active-learning and new selection methods) is finally considered to explore more complex and unknown YH x phases, unreachable by former CSP algorithms. New complex phases are found, demonstrating the ability of our approach to push back the exponential wall of complexity related to CSP.
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Affiliation(s)
| | - G. Geneste
- CEA-DAM, DIF, F-91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
| | - M. Torrent
- CEA-DAM, DIF, F-91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
| | - J.-B. Maillet
- CEA-DAM, DIF, F-91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
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43
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Superconductivity above 200 K discovered in superhydrides of calcium. Nat Commun 2022; 13:2863. [PMID: 35606357 PMCID: PMC9126910 DOI: 10.1038/s41467-022-30454-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 04/27/2022] [Indexed: 11/28/2022] Open
Abstract
Searching for superconductivity with Tc near room temperature is of great interest both for fundamental science & many potential applications. Here we report the experimental discovery of superconductivity with maximum critical temperature (Tc) above 210 K in calcium superhydrides, the new alkali earth hydrides experimentally showing superconductivity above 200 K in addition to sulfur hydride & rare-earth hydride system. The materials are synthesized at the synergetic conditions of 160~190 GPa and ~2000 K using diamond anvil cell combined with in-situ laser heating technique. The superconductivity was studied through in-situ high pressure electric conductance measurements in an applied magnetic field for the sample quenched from high temperature while maintained at high pressures. The upper critical field Hc(0) was estimated to be ~268 T while the GL coherent length is ~11 Å. The in-situ synchrotron X-ray diffraction measurements suggest that the synthesized calcium hydrides are primarily composed of CaH6 while there may also exist other calcium hydrides with different hydrogen contents. The discovery of superconductivity in hydrides at critical temperature (Tc) near room temperature receives intensive attentions. Here the authors report experimental synthesis and discovery of superconductivity with Tc above 210 K in calcium superhydrides at 160–190 GPa.
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44
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Luo Y, Zhang J, Tian H, Wang Y, Cui H, Ma Y, Cui Q. Interplay between External High Pressure and Intrinsic Jahn–Teller Effect in the Compression Behavior of Clinoatacamite. Inorg Chem 2022; 61:6869-6880. [DOI: 10.1021/acs.inorgchem.2c00206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yaxiao Luo
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Jian Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Hui Tian
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Yingying Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Hang Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Yanmei Ma
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Qiliang Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
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45
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Ma L, Wang K, Xie Y, Yang X, Wang Y, Zhou M, Liu H, Yu X, Zhao Y, Wang H, Liu G, Ma Y. High-Temperature Superconducting Phase in Clathrate Calcium Hydride CaH_{6} up to 215 K at a Pressure of 172 GPa. PHYSICAL REVIEW LETTERS 2022; 128:167001. [PMID: 35522494 DOI: 10.1103/physrevlett.128.167001] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 01/18/2022] [Accepted: 03/09/2022] [Indexed: 05/25/2023]
Abstract
The recent discovery of superconductive rare earth and actinide superhydrides has ushered in a new era of superconductivity research at high pressures. This distinct type of clathrate metal hydrides was first proposed for alkaline-earth-metal hydride CaH_{6} that, however, has long eluded experimental synthesis, impeding an understanding of pertinent physics. Here, we report successful synthesis of CaH_{6} and its measured superconducting critical temperature T_{c} of 215 K at 172 GPa, which is evidenced by a sharp drop of resistivity to zero and a characteristic decrease of T_{c} under a magnetic field up to 9 T. An estimate based on the Werthamer-Helfand-Hohenberg model gives a giant zero-temperature upper critical magnetic field of 203 T. These remarkable benchmark superconducting properties place CaH_{6} among the most outstanding high-T_{c} superhydrides, marking it as the hitherto only clathrate metal hydride outside the family of rare earth and actinide hydrides. This exceptional case raises great prospects of expanding the extraordinary class of high-T_{c} superhydrides to a broader variety of compounds that possess more diverse material features and physics characteristics.
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Affiliation(s)
- Liang Ma
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Kui Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Yu Xie
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun 130012, China
| | - Xin Yang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Yingying Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Mi Zhou
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Hanyu Liu
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
- State Key Laboratory of Superhard Materials and Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China
| | - Xiaohui Yu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yongsheng Zhao
- Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany
| | - Hongbo Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Guangtao Liu
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
| | - Yanming Ma
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Computational Method and Software, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
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46
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Li YP, Yang L, Liu HD, Jiao N, Ni MY, Hao N, Lu HY, Zhang P. Phonon-mediated superconductivity in two-dimensional hydrogenated phosphorus carbide: HPC 3. Phys Chem Chem Phys 2022; 24:9256-9262. [PMID: 35388845 DOI: 10.1039/d2cp00997h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, three-dimensional (3D) high-temperature superconductors at ultrahigh pressure have been reported, typical examples are the polyhydrides H3S, LaH10, YH9, etc. To find high-temperature two-dimensional (2D) superconductors at atmospheric pressure is another research hotspot. Here, we investigated the possible superconductivity in a hydrogenated monolayer phosphorus carbide based on first-principles calculations. The results reveal that monolayer PC3 transforms from a semiconductor to a metal after hydrogenation. Interestingly, the C-π-bonding band contributes most to the states at the Fermi level. Based on the electron-phonon coupling mechanism, it is found that the electron-phonon coupling constant of HPC3 is 0.95, which mainly originates from the coupling of C-π electrons with the in-plane vibration modes of C and H. The calculated critical temperature Tc is 31.0 K, which is higher than those in most 2D superconductors. By further applying a biaxial tensile strain of 3%, the Tc can be boosted to 57.3 K, exceeding the McMillan limit. Thus, hydrogenation and strain are effective ways for increasing the superconducting Tc of 2D materials.
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Affiliation(s)
- Ya-Ping Li
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Liu Yang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Hao-Dong Liu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Na Jiao
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Mei-Yan Ni
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Ning Hao
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Hong-Yan Lu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Ping Zhang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China. .,Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
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Errea I. Superconducting hydrides on a quantum landscape. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:231501. [PMID: 35255480 DOI: 10.1088/1361-648x/ac5b46] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Reaching superconductivity at ambient conditions is one of the biggest scientific dreams. The discoveries in the last few years at high pressures place hydrogen-based compounds as the best candidates for making it true. As the recent history shows, first-principles calculations are expected to continue guiding the experimental quest in the right track in the coming years. Considering that ionic quantum fluctuations largely affect the crystal structure and the vibrational properties of superconducting hydrides, in many cases making them thermodynamically stable at much lower pressures than expected, it will be crucial to include such effects on the futureab initiopredictions. The prospects for low-pressure high critical-temperature compounds are wide open, even at ambient pressure.
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Affiliation(s)
- Ion Errea
- Fisika Aplikatua Saila, Gipuzkoako Ingeniaritza Eskola, University of the Basque Country (UPV/EHU), Europa Plaza 1, 20018 Donostia/San Sebastián, Spain
- Centro de Física de Materiales (CSIC-UPV/EHU), Manuel de Lardizabal pasealekua 5, 20018 Donostia/San Sebastián, Spain
- Donostia International Physics Center (DIPC), Manuel de Lardizabal pasealekua 4, 20018 Donostia/San Sebastián, Spain
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48
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Pei C, Ying T, Zhang Q, Wu X, Yu T, Zhao Y, Gao L, Li C, Cao W, Zhang Q, Schnyder AP, Gu L, Chen X, Hosono H, Qi Y. Caging-Pnictogen-Induced Superconductivity in Skutterudites IrX 3 (X = As, P). J Am Chem Soc 2022; 144:6208-6214. [PMID: 35357829 DOI: 10.1021/jacs.1c09244] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here, we report on a new kind of compound, XδIr4X12-δ (X = P, As), the first hole-doped skutterudites superconductor. We provide atomic-resolution images of the caging As atoms using scanning transmission electron microscopy (STEM). By inserting As atoms into the caged structure under a high pressure, superconductivity emerges with a maximum transition temperature (Tc) of 4.4 K (4.8 K) in IrAs3 (IrP3). In contrast to all of the electron-doped skutterudites, the electronic states around the Fermi level in XδIr4X12-δ are dominated by the caged X atom, which can be described by a simple body-centered tight-binding model, implying a distinct pairing mechanism. Our density functional theory (DFT) calculations reveal an intimate relationship between the pressure-dependent local-phonon mode and the enhancement of Tc. The discovery of XδIr4X12-δ provides an arena to investigate the uncharted territory of hole-doped skutterudites, and the method proposed here represents a new strategy of carrier doping in caged structures, without introducing extra elements.
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Affiliation(s)
- Cuiying Pei
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Tianping Ying
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xianxin Wu
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - Tongxu Yu
- Gusu Laboratory of Materials, Suzhou, Jiangsu 215123, China
| | - Yi Zhao
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Lingling Gao
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Changhua Li
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Weizheng Cao
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Qing Zhang
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China.,Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, China
| | - Andreas P Schnyder
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaolong Chen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yanpeng Qi
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China.,Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, China.,ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China
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49
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Li H, Gao T, Ma S, Ye X. Predicted structures and superconductivity of LiYH n ( n = 5-10) under high pressure. Phys Chem Chem Phys 2022; 24:8432-8438. [PMID: 35343528 DOI: 10.1039/d2cp00059h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structures of LiYHn (n = 5-10) compounds in the pressure range of 0-300 GPa have been extensively explored using the CALYPSO structure prediction method based on the particle swarm optimization algorithm and first-principles calculation. Four stable structures (P21/m LiYH6, C2/c LiYH8, P1̄ LiYH9, R3̄m LiYH10) and three metastable phases (Pnma LiYH6, P1̄ LiYH8, Immm LiYH9) were predicted. They all exhibit metallic and superconducting behavior in their respective stable pressure ranges, and the predicted superconducting transition temperature Tc is within 22-109 K when the pressure is greater than 100 GPa. It was found that after doping Li into YHn (n = 6, 9, 10), the H2 units in the system increased, the electron-phonon coupling interaction weakened, and Tc decreased when the structural characteristics, electronic density of states distribution, and superconductivity of LiYHn and YHn (n = 6, 8, 9, 10) were compared. Systems that have a high density of H_s states and a low number of Y_d states at the Fermi level have stronger electron-phonon coupling (EPC) interactions and higher Tc.
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Affiliation(s)
- Huan Li
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China. .,Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621908, China.
| | - Tao Gao
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.
| | - Shiyin Ma
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.
| | - Xiaoqiu Ye
- Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621908, China.
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Du M, Zhao W, Cui T, Duan D. Compressed superhydrides: the road to room temperature superconductivity. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:173001. [PMID: 35078164 DOI: 10.1088/1361-648x/ac4eaf] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Room-temperature superconductivity has been a long-held dream and an area of intensive research. The discovery of H3S and LaH10under high pressure, with superconducting critical temperatures (Tc) above 200 K, sparked a race to find room temperature superconductors in compressed superhydrides. In recent groundbreaking work, room-temperature superconductivity of 288 K was achieved in carbonaceous sulfur hydride at 267 GPa. Here, we describe the important attempts of hydrides in the process of achieving room temperature superconductivity in decades, summarize the main characteristics of high-temperature hydrogen-based superconductors, such as hydrogen structural motifs, bonding features, electronic structure as well as electron-phonon coupling etc. This work aims to provide an up-to-date summary of several type hydrogen-based superconductors based on the hydrogen structural motifs, including covalent superhydrides, clathrate superhydrides, layered superhydrides, and hydrides containing isolated H atom, H2and H3molecular units.
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Affiliation(s)
- Mingyang Du
- College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Wendi Zhao
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Tian Cui
- College of Physics, Jilin University, Changchun 130012, People's Republic of China
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Defang Duan
- College of Physics, Jilin University, Changchun 130012, People's Republic of China
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