Superconductivity up to 17 K in the high-pressure rhombohedral-I phase of ReO3: a potential oxide analogy of hydride superconductors
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866915222352035840 |
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| author | Shan, P. F. Lu, T. L. Liu, Z. Y. Jiao, Y. Y. Yang, P. T. Hou, J. Ma, L. Uwatoko, Y. Dong, X. L. Wang, B. S. Liu, M. Sun, J. P. Cheng, J. -G. |
| author_facet | Shan, P. F. Lu, T. L. Liu, Z. Y. Jiao, Y. Y. Yang, P. T. Hou, J. Ma, L. Uwatoko, Y. Dong, X. L. Wang, B. S. Liu, M. Sun, J. P. Cheng, J. -G. |
| contents | As an A-site-vacant perovskite-type oxide, ReO3 undergoes sequential pressure-driven structural transitions associated with the rotation of ReO6 octahedra. The rhombohedral-I phase in the pressure range of 12-39 GPa is featured by a lattice of nearly close-packed oxygen layers intercalated with Re cations, in reminiscent of the recently discovered superhydride superconductors. A combined study of first-principles calculations and transport measurements under high pressures enabled us to discover superconductivity in the rhombohedral-I phase, and it shows a dome-shaped Tc(P) with a maximum Tc of 17 K at about 30 GPa. In addition to the enhanced density of states at Fermi level compared to that of the ambient phase, the vibrations of hexagonal-close-packed oxygen lattice significantly strengthen the electron-phonon coupling, which is responsible for observed superconductivity with a relatively high Tc. The present work thus establishes a rare case among oxide superconductors that the light-element oxygen lattice plays a crucial role in inducing superconductivity. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2304_09011 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Superconductivity up to 17 K in the high-pressure rhombohedral-I phase of ReO3: a potential oxide analogy of hydride superconductors Shan, P. F. Lu, T. L. Liu, Z. Y. Jiao, Y. Y. Yang, P. T. Hou, J. Ma, L. Uwatoko, Y. Dong, X. L. Wang, B. S. Liu, M. Sun, J. P. Cheng, J. -G. Superconductivity As an A-site-vacant perovskite-type oxide, ReO3 undergoes sequential pressure-driven structural transitions associated with the rotation of ReO6 octahedra. The rhombohedral-I phase in the pressure range of 12-39 GPa is featured by a lattice of nearly close-packed oxygen layers intercalated with Re cations, in reminiscent of the recently discovered superhydride superconductors. A combined study of first-principles calculations and transport measurements under high pressures enabled us to discover superconductivity in the rhombohedral-I phase, and it shows a dome-shaped Tc(P) with a maximum Tc of 17 K at about 30 GPa. In addition to the enhanced density of states at Fermi level compared to that of the ambient phase, the vibrations of hexagonal-close-packed oxygen lattice significantly strengthen the electron-phonon coupling, which is responsible for observed superconductivity with a relatively high Tc. The present work thus establishes a rare case among oxide superconductors that the light-element oxygen lattice plays a crucial role in inducing superconductivity. |
| title | Superconductivity up to 17 K in the high-pressure rhombohedral-I phase of ReO3: a potential oxide analogy of hydride superconductors |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2304.09011 |