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Belli F, Novoa T, Contreras-García J, Errea I. Strong correlation between electronic bonding network and critical temperature in hydrogen-based superconductors. Nat Commun 2021; 12:5381. [PMID: 34531389 PMCID: PMC8446067 DOI: 10.1038/s41467-021-25687-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 08/25/2021] [Indexed: 02/08/2023] Open
Abstract
By analyzing structural and electronic properties of more than a hundred predicted hydrogen-based superconductors, we determine that the capacity of creating an electronic bonding network between localized units is key to enhance the critical temperature in hydrogen-based superconductors. We define a magnitude named as the networking value, which correlates with the predicted critical temperature better than any other descriptor analyzed thus far. By classifying the studied compounds according to their bonding nature, we observe that such correlation is bonding-type independent, showing a broad scope and generality. Furthermore, combining the networking value with the hydrogen fraction in the system and the hydrogen contribution to the density of states at the Fermi level, we can predict the critical temperature of hydrogen-based compounds with an accuracy of about 60 K. Such correlation is useful to screen new superconducting compounds and offers a deeper understating of the chemical and physical properties of hydrogen-based superconductors, while setting clear paths for chemically engineering their critical temperatures.
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Affiliation(s)
- Francesco Belli
- grid.482265.f0000 0004 1762 5146Centro de Física de Materiales (CSIC-UPV/EHU), Donostia/San Sebastián, Spain ,grid.11480.3c0000000121671098Fisika Aplikatua Saila, Gipuzkoako Ingeniaritza Eskola, University of the Basque Country (UPV/EHU), Donostia/San Sebastián, Spain
| | - Trinidad Novoa
- grid.462844.80000 0001 2308 1657Laboratoire de Chimie Théorique (LCT), Sorbonne Université CNRS, Paris, France
| | - J. Contreras-García
- grid.462844.80000 0001 2308 1657Laboratoire de Chimie Théorique (LCT), Sorbonne Université CNRS, Paris, France
| | - Ion Errea
- grid.482265.f0000 0004 1762 5146Centro de Física de Materiales (CSIC-UPV/EHU), Donostia/San Sebastián, Spain ,grid.11480.3c0000000121671098Fisika Aplikatua Saila, Gipuzkoako Ingeniaritza Eskola, University of the Basque Country (UPV/EHU), Donostia/San Sebastián, Spain ,grid.452382.a0000 0004 1768 3100Donostia International Physics Center (DIPC), Donostia/San Sebastián, Spain
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Du M, Zhang Z, Song H, Yu H, Cui T, Kresin VZ, Duan D. High-temperature superconductivity in transition metallic hydrides MH 11 (M = Mo, W, Nb, and Ta) under high pressure. Phys Chem Chem Phys 2021; 23:6717-6724. [PMID: 33710184 DOI: 10.1039/d0cp06435a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The discovery of H3S and LaH10 is an important step towards the development of room temperature superconductors which fuels the enthusiasm for finding promising superconductors among hydrides at high pressure. In the present study, three new and stable stoichiometric MoH5, MoH6 and MoH11 compounds were found in the pressure range of 100-300 GPa. The highly hydrogen-rich phase of Cmmm-MoH11 has a layered structure that contains various forms of hydrogen: H, H2- and H3- units. It is a high-Tc material with an estimated Tc value in the range of 165-182 K at 250 GPa. The same structures are also found in NbH11, TaH11, and WH11, each material showing Tc ranging from 117 to 168 K. By combining the method of using two coupling constants λopt and λac, and two characteristic frequencies (optical and acoustic) with first-principle calculations, we found that the high values of Tc are mainly caused by the presence of high frequency optical modes, but the acoustic modes also play a noticeable role.
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Affiliation(s)
- Mingyang Du
- State Key Laboratory of Superhard Materials, Department of Physics, Jilin University, Changchun 130012, People's Republic of China.
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Peña-Alvarez M, Li B, Kelsall LC, Binns J, Dalladay-Simpson P, Hermann A, Howie RT, Gregoryanz E. Synthesis of Superconducting Cobalt Trihydride. J Phys Chem Lett 2020; 11:6420-6425. [PMID: 32658481 DOI: 10.1021/acs.jpclett.0c01807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The Co-H system has been investigated through high-pressure, high-temperature X-ray diffraction experiments combined with first-principles calculations. On compression of elemental cobalt in a hydrogen medium, we observe face-centered cubic cobalt hydride (CoH) and cobalt dihydride (CoH2) above 33 GPa. Laser heating CoH2 in a hydrogen matrix at 75 GPa to temperatures in excess of ∼800 K produces cobalt trihydride (CoH3) which adopts a primitive structure. Density functional theory calculations support the stability of CoH3. This phase is predicted to be thermodynamically stable at pressures above 18 GPa and to be a superconductor below 23 K. Theory predicts that this phase remains dynamically stable upon decompression above 11 GPa where it has a maximum Tc of 30 K.
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Affiliation(s)
- Miriam Peña-Alvarez
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
| | - Bin Li
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
- New Energy Technology Engineering Laboratory of Jiangsu Province and School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Liam C Kelsall
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
| | - Jack Binns
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
| | - Philip Dalladay-Simpson
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
| | - Andreas Hermann
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
| | - Ross T Howie
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
| | - Eugene Gregoryanz
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
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Binns J, He Y, Donnelly ME, Peña-Alvarez M, Wang M, Kim DY, Gregoryanz E, Dalladay-Simpson P, Howie RT. Complex Hydrogen Substructure in Semimetallic RuH 4. J Phys Chem Lett 2020; 11:3390-3395. [PMID: 32251597 DOI: 10.1021/acs.jpclett.0c00688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
When compressed in a matrix of solid hydrogen, many metals form compounds with increasingly high hydrogen contents. At high density, hydrogenic sublattices can emerge, which may act as low-dimensional analogues of atomic hydrogen. We show that at high pressures and temperatures, ruthenium forms polyhydride species that exhibit intriguing hydrogen substructures with counterintuitive electronic properties. Ru3H8 is synthesized from RuH in H2 at 50 GPa and at temperatures in excess of 1000 K, adopting a cubic structure with short H-H distances. When synthesis pressures are increased above 85 GPa, we observe RuH4 which crystallizes in a remarkable structure containing corner-sharing H6 octahedra. Calculations indicate this phase is semimetallic at 100 GPa.
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Affiliation(s)
- Jack Binns
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Yu He
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
- Key Laboratory of High-Temperature and High-Pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, China
| | - Mary-Ellen Donnelly
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Miriam Peña-Alvarez
- Centre for Science at Extreme Conditions and The School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Mengnan Wang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Duck Young Kim
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Eugene Gregoryanz
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
- Centre for Science at Extreme Conditions and The School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Philip Dalladay-Simpson
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Ross T Howie
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
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Xie H, Zhang W, Duan D, Huang X, Huang Y, Song H, Feng X, Yao Y, Pickard CJ, Cui T. Superconducting Zirconium Polyhydrides at Moderate Pressures. J Phys Chem Lett 2020; 11:646-651. [PMID: 31903761 DOI: 10.1021/acs.jpclett.9b03632] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Highly compressed hydrides have been at the forefront of the search for high-Tc superconductivity. The recent discovery of record-high Tc's in H3S and LaH10±x under high pressure fuels the enthusiasm for finding good superconductors in similar hydride groups. Guided by first-principles structure prediction, we successfully synthesized ZrH3 and Zr4H15 at modest pressures (30-50 GPa) in diamond anvil cells by two different reaction routes: ZrH2 + H2 at room temperature and Zr + H2 at ∼1500 K by laser heating. From the synchrotron X-ray diffraction patterns, ZrH3 is found to have a Pm3̅n structure corresponding to the familiar A15 structure, and Zr4H15 has an I4̅3d structure isostructural to Th4H15. Electrical resistance measurement and the dependence of Tc on the applied magnetic field of the sample showed the emergence of two superconducting transitions at 6.4 and 4.0 K at 40 GPa, which correspond to the two Tc's for ZrH3 and Zr4H15.
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Affiliation(s)
- Hui Xie
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Wenting Zhang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
- Department of Materials Science and Metallurgy , University of Cambridge , 27 Charles Babbage Road , Cambridge CB3 0FS , United Kingdom
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Yanping Huang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Hao Song
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Xiaolei Feng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , 10 Xibeiwang East Road , Beijing , 100094 , China
- Department of Earth Science , University of Cambridge , Downing Street , Cambridge CB2 3EQ , United Kingdom
| | - Yansun Yao
- Department of Physics and Engineering Physics , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5E2 , Canada
| | - Chris J Pickard
- Department of Materials Science and Metallurgy , University of Cambridge , 27 Charles Babbage Road , Cambridge CB3 0FS , United Kingdom
- Advanced Institute for Materials Research , Tohoku University , 2-1-1 Katahira , Aoba, Sendai 980-8577 , Japan
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
- School of Physical Science and Technology , Ningbo University , No. 818 Fenghua Road , Jiangbei District, Ningbo , 315211 , China
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Wang M, Binns J, Donnelly ME, Peña-Alvarez M, Dalladay-Simpson P, Howie RT. High pressure synthesis and stability of cobalt hydrides. J Chem Phys 2018; 148:144310. [DOI: 10.1063/1.5026535] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Mengnan Wang
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Jack Binns
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Mary-Ellen Donnelly
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Miriam Peña-Alvarez
- School of Physics and Astronomy and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - Philip Dalladay-Simpson
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Ross T. Howie
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
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