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Sun W, Li S, Li X, Ouyang T, Liu K, Mu D, Lu C, Peng F. High-Tcsuperconductivity in doped molecular superconductors ofK4B8-xMxH32(M = C, N) under high pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:425704. [PMID: 38955332 DOI: 10.1088/1361-648x/ad5e2d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 07/01/2024] [Indexed: 07/04/2024]
Abstract
Stabilized and metallic light elements hydrides have provided a potential route to achieve the goal of room-temperature superconductors at moderate or ambient pressures. Here, we have performed systematic DFT theoretical calculations to examine the effects of different light elements C and N atoms doped in cubic K4B8H32hydrides on the superconductivity at low pressures. As a result of various atoms substituting, we have found that metallic K4B_{8-x}MxH32(M = C, N) hydrides are dynamically stable at 50 GPa, band structures and density of states (DOS) indicate that sizeableTccorrelates with a high B-H DOS at the Fermi level. With the increasing of B atoms in K4B_{8-x}MxH32hydrides, the DOS values at Fermi level have been improved due to the delocalized electrons in B-H bonds, which result in strong electron-phonon coupling (EPC) interaction and increase theTcfrom 19.04 to 77.07 K for KC2H8and KB2H8at 50 GPa. The NH4unit in stable K4B7NH32hydrides has weakened the EPC and led to lowTcvalue of 21.47 K. Our results suggest the light elements hydrides KB2H8and K4B7CH32could estimate highTcvalues at 50 GPa, and the boron hydrides would be potential candidates to design or modulate hydrides superconductors with highTcat moderate or ambient pressures.
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Affiliation(s)
- Weiguo Sun
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, People's Republic of China
| | - Simin Li
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Xiaofeng Li
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, People's Republic of China
| | - Tong Ouyang
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, People's Republic of China
| | - Kainan Liu
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, People's Republic of China
| | - Dexin Mu
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, People's Republic of China
| | - Cheng Lu
- School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, People's Republic of China
| | - Feng Peng
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, People's Republic of China
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2
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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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3
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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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4
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Huang H, Deng C, Song H, Du M, Duan D, Liu Y, Cui T. Superconductivity of thulium substituted clathrate hexahydrides at moderate pressure. Sci Rep 2024; 14:10729. [PMID: 38730055 PMCID: PMC11087549 DOI: 10.1038/s41598-024-61400-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 05/06/2024] [Indexed: 05/12/2024] Open
Abstract
Due to the BCS theory, hydrogen, the lightest element, would be the prospect of room-temperature superconductor after metallization, but because of the difficulty of the hydrogen metallization, the theory about hydrogen pre-compression was proposed that the hydrogen-rich compounds could be a great option for the high Tc superconductors. The superior properties of TmH6, YbH6 and LuH6 indicated the magnificent potential of heavy rare earth elements for low-pressure stability. Here, we designed XTmH12 (X = Y, Yb, Lu, and La) to obtain higher Tc while maintaining low pressure stability. Most prominently, YbTmH12 can stabilize at a pressure of 60 GPa. Compared with binary TmH6 hydride, its Tc was increased to 48 K. The results provide an effective method for the rational design of moderate pressure stabilized hydride superconductors.
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Affiliation(s)
- Hongyu Huang
- School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Chao Deng
- School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Hao Song
- School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Mingyang Du
- School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China.
| | - Defang Duan
- College of Physics, Jilin University, Changchun, 130012, People's Republic of China
| | - Yanhui Liu
- School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Tian Cui
- School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China.
- College of Physics, Jilin University, Changchun, 130012, People's Republic of China.
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5
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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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6
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Du M, Song H, Zhang Z, Duan D, Cui T. Room-Temperature Superconductivity in Yb/Lu Substituted Clathrate Hexahydrides under Moderate Pressure. Research (Wash D C) 2022; 2022:9784309. [PMID: 36061823 PMCID: PMC9394054 DOI: 10.34133/2022/9784309] [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: 05/09/2022] [Accepted: 07/18/2022] [Indexed: 11/24/2022] Open
Abstract
Room temperature superconductivity is a dream that mankind has been chasing for a century. In recent years, the synthesis of H3S, LaH10, and C-S-H compounds under high pressures has gradually made that dream become a reality. But the extreme high pressure required for stabilization of hydrogen-based superconductors limit their applications. So, the next challenge is to achieve room-temperature superconductivity at significantly low pressures, even ambient pressure. In this work, we design a series of high temperature superconductors that can be stable at moderate pressures by incorporating heavy rare earth elements Yb/Lu into sodalite-like clathrate hexahydrides. In particular, the critical temperatures (Tc) of Y3LuH24, YLuH12, and YLu3H24 can reach 283 K at 120 GPa, 275 K at 140 GPa, and 288 K at 110 GPa, respectively. Their critical temperatures are close to or have reached room temperature, and minimum stable pressures are significantly lower than that of reported room temperature superconductors. Our work provides an effective method for the rational design of low-pressure stabilized hydrogen-based superconductors with room-temperature superconductivity simultaneously and will stimulate further experimental exploration.
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Affiliation(s)
- Mingyang Du
- College of Physics, Jilin University, Changchun 130012, China
| | - Hao Song
- College of Physics, Jilin University, Changchun 130012, China
| | - Zihan Zhang
- College of Physics, Jilin University, Changchun 130012, China
| | - Defang Duan
- College of Physics, Jilin University, Changchun 130012, China
| | - Tian Cui
- College of Physics, Jilin University, Changchun 130012, China
- Institute of High-Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
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7
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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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8
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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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9
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Song P, Hou Z, de Castro PB, Nakano K, Takano Y, Maezono R, Hongo K. The Systematic Study on the Stability and Superconductivity of Y‐Mg‐H Compounds under High Pressure. ADVANCED THEORY AND SIMULATIONS 2022. [DOI: 10.1002/adts.202100364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Peng Song
- School of Information Science JAIST Asahidai 1‐1 Nomi Ishikawa 923‐1292 Japan
| | - Zhufeng Hou
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
| | - Pedro Baptista de Castro
- National Institute for Materials Science 1‐2‐1 Sengen Tsukuba Ibaraki 305‐0047 Japan
- University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8577 Japan
| | - Kousuke Nakano
- School of Information Science JAIST Asahidai 1‐1 Nomi Ishikawa 923‐1292 Japan
- International School for Advanced Studies (SISSA) Via Bonomea 265, Trieste 34136 Italy
| | - Yoshihiko Takano
- National Institute for Materials Science 1‐2‐1 Sengen Tsukuba Ibaraki 305‐0047 Japan
- University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8577 Japan
| | - Ryo Maezono
- School of Information Science JAIST Asahidai 1‐1 Nomi Ishikawa 923‐1292 Japan
| | - Kenta Hongo
- Research Center for Advanced Computing Infrastructure JAIST Asahidai 1‐1 Nomi Ishikawa 923‐1292 Japan
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10
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Zhang X, Zhao Y, Yang G. Superconducting ternary hydrides under high pressure. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2021. [DOI: 10.1002/wcms.1582] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- 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 China
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light‐Emitting Materials and Technology of Ministry of Education Northeast Normal University Changchun China
| | - Yaping Zhao
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science Yanshan University Qinhuangdao 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 China
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light‐Emitting Materials and Technology of Ministry of Education Northeast Normal University Changchun China
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11
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Wei YK, Jia LQ, Fang YY, Wang LJ, Qian ZX, Yuan JN, Selvaraj G, Ji GF, Wei DQ. Formation and superconducting properties of predicted ternary hydride
ScYH
6
under pressures. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2020. [DOI: 10.1002/qua.26459] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yong Kai Wei
- College of Science Henan University of Technology Zhengzhou China
| | - Liang Quan Jia
- Department of Information Engineering Huzhou University Huzhou China
| | - Yan Yan Fang
- Pediatric Intensive Care Unit The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Long Jun Wang
- Pediatric Intensive Care Unit The First Affiliated Hospital of Zhengzhou University Zhengzhou China
| | - Zhi Xiu Qian
- College of Science Henan University of Technology Zhengzhou China
| | - Jiao Nan Yuan
- College of Science Henan University of Technology Zhengzhou China
| | | | - Guang Fu Ji
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics Chinese Academy of Engineering Physics Mianyang China
| | - Dong Qing Wei
- College of Science Henan University of Technology Zhengzhou China
- State Key laboratory of Microbial Metabolism, College of Life Science and Biotechnology Shanghai Jiao Tong University Shanghai China
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12
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Sun Y, Lv J, Xie Y, Liu H, Ma Y. Route to a Superconducting Phase above Room Temperature in Electron-Doped Hydride Compounds under High Pressure. PHYSICAL REVIEW LETTERS 2019; 123:097001. [PMID: 31524448 DOI: 10.1103/physrevlett.123.097001] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Indexed: 06/10/2023]
Abstract
The recent theory-orientated discovery of record high-temperature superconductivity (T_{c}∼250 K) in sodalitelike clathrate LaH_{10} is an important advance toward room-temperature superconductors. Here, we identify an alternative clathrate structure in ternary Li_{2}MgH_{16} with a remarkably high estimated T_{c} of ∼473 K at 250 GPa, which may allow us to obtain room-temperature or even higher-temperature superconductivity. The ternary compound mimics a Li- or electron-doped binary hydride of MgH_{16}. The parent hydride contains H_{2} molecules and is not a good superconductor. The extra electrons introduced break up the H_{2} molecules, increasing the amount of atomic hydrogen compared with the parent hydride, which is necessary for stabilizing the clathrate structure or other high-T_{c} structures. Our results provide a viable strategy for tuning the superconductivity of hydrogen-rich hydrides by donating electrons to hydrides via metal doping. Our approach may pave the way for finding high-T_{c} superconductors in a variety of ternary or quaternary hydrides.
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Affiliation(s)
- Ying Sun
- Innovation Center of Computational Physics Methods and Software and State Key Laboratory for Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Jian Lv
- Innovation Center of Computational Physics Methods and Software and State Key Laboratory for Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Yu Xie
- Innovation Center of Computational Physics Methods and Software and State Key Laboratory for Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Hanyu Liu
- Innovation Center of Computational Physics Methods and Software and State Key Laboratory for Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Yanming Ma
- Innovation Center of Computational Physics Methods and Software and State Key Laboratory for Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
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