Prediction of Ambient Pressure Conventional Superconductivity above 80K in Thermodynamically Stable Hydride Compounds
| Autor: | Sanna, Antonio, Cerqueira, Tiago F. T., Fang, Yue-Wen, Errea, Ion, Ludwig, Alfred, Marques, Miguel A. L. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | npj Comput Mater 10, 44 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41524-024-01214-9 |
| Popis: | The primary challenge in the field of high-temperature superconductivity in hydrides is to achieve a superconducting state at ambient pressure rather than the extreme pressures that have been required in experiments so far. Here, we propose a family of compounds, of composition Mg$_2$XH$_6$ with X$=$Rh, Ir, Pd, or Pt, that achieves this goal. These materials were identified by scrutinizing more than a million compounds using a machine-learning accelerated high-throughput workflow. They are thermodynamically stable, indicating that they are serious candidates for experimental synthesis. We predict that their superconducting transition temperatures are in the range of 45-80K, or even above 100K with appropriate electron doping of the Pt compound. These results indicate that, although very rare, high-temperature superconductivity in thermodynamically stable hydrides is achievable at room pressure. Comment: 9 pages, 6 figures |
| Databáze: | arXiv |
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