High-pressure phases of silane

Details High-pressure phases of silane High-pressure phases of silane

2006-04-19

arxiv.org/abs/cond-mat/0604454v1

Physics

Condensed Matter

Materials Science

5 pages, 3 figures and 1 table

Scientific paper

10.1103/PhysRevLett.97.045504

It has been suggested that hydrogen may metallise at lower pressures if it is ``precompressed''. Here we introduce a search strategy for predicting high-pressure structures and apply it to silane using first-principles electronic structure computations. It is based on relaxing randomly chosen structures, and is demonstrated to work well for unit cells containing up to at least ten atoms. We predict that silane will metallise at higher pressures than previously anticipated, but we suggest that the metallic phase might show high-temperature superconductivity at experimentally accessible pressures.

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