| Autor: |
Tresca, Cesare, Forcella, Pietro Maria, Angeletti, Andrea, Ranalli, Luigi, Franchini, Cesare, Reticcioli, Michele, Profeta, Gianni |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Nat. Comm. 2024 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41467-024-51348-z |
| Popis: |
The discovery of ambient superconductivity would mark an epochal breakthrough long-awaited for over a century, potentially ushering in unprecedented scientific and technological advancements. The recent findings on high-temperature superconducting phases in various hydrides under high pressure have ignited optimism, suggesting that the realization of near-ambient superconductivity might be on the horizon. However, the preparation of hydride samples tends to promote the emergence of various metastable phases, marked by a low level of experimental reproducibility. Identifying these phases through theoretical and computational methods entails formidable challenges, often resulting in controversial outcomes. In this paper, we consider N-doped LuH3 as a prototypical complex hydride: By means of machine-learning-accelerated force-field molecular dynamics, we have identified the formation of H2 molecules stabilized at ambient pressure by nitrogen impurities. Importantly, we demonstrate that this molecular phase plays a pivotal role in the emergence of a dynamically stable, low-temperature, experimental-ambient-pressure superconductivity. The potential to stabilize hydrogen in molecular form through chemical doping opens up a novel avenue for investigating disordered phases in hydrides and their transport properties under near-ambient conditions. |
| Databáze: |
arXiv |
| Externí odkaz: |
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