Phonon-mediated superconductivity in the metal-bonded perovskite Al4H up to 54 K under ambient pressure
Yong He, Jing Lu, Xinqiang Wang, Jun-jie Shi
DOI 10.1103/PhysRevB.108.054515 · Physical Review B
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Abstract
Multihydrogen lanthanum hydrides have shown the highest critical temperature Tc at 250–260 K under pressures of 170–200 GPa. However, such high pressure is a great challenge for sample preparation and practical applications. To address this challenge, we propose a design strategy for ambient-pressure superconductors that involves constructing few-hydrogen metal-bonded perovskite hydrides, such as the Al-based superconductor Al4H, with better ductility than the well-known multihydrogen, cuprate, and Fe-based superconductors. Based on the Migdal-Eliashberg theory, we predict that the structurally stable Al4H has a favorable Tc of up to 54 K under ambient pressure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al4H Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 54 | Pressure unresolved | unknown |
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 255 | 185 GPa | unknown |
| (H2S)2H2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 197.5 | 200 GPa | unknown |
| SiH4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17 | Pressure not reported | unknown |
| YH9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 243 | Pressure not reported | unknown |
| ThH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 161 | Pressure not reported | unknown |
| CaH6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 215 | Pressure not reported | unknown |
| Th4H15 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.2 | Pressure unresolved | unknown |
| PdCuH2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure unresolved | unknown |
| CrH Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.6 | Pressure unresolved | unknown |
| CrH3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.1 | 81 GPa | unknown |
| KB2H8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 140 | 12 GPa | unknown |
| AlH3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.04 | 110 GPa | unknown |
| AlH2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.75 | Pressure not reported | unknown |
| AlH Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 58 | 180 GPa | unknown |
| Al2H Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.5 | 195 GPa | unknown |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.2 | Pressure not reported | unknown |
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