Journal
PHYSICAL REVIEW B
Volume 84, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.054543
Keywords
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Funding
- National Natural Science Foundation of China [50821001]
- 973 Program of China [2010CB731605, 2011CB808205]
- Postdoctoral Fund of China [20090460685]
- State Key Laboratory of Metastable Materials Science and Technology [201106]
- Intel Corporation
- Research Foundation of Stony Brook University, Rosnauka (Russia) [02.740.11.5102]
- DARPA [54751]
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Recently, a superconducting transition was found in silane in high-pressure experiments. However, the experimental x-ray diffraction (XRD) patterns do not match any one of the proposed silane structures, and it has been suggested to be originated from a platinum hydride. Here the underlying physics behind the anomalous superconducting transition in experiment is revealed by first-principles calculations. We predict a stable hexagonal P6(3)/mmc phase of platinum hydride at high pressure. Its lattice constants and simulated XRD pattern are in excellent agreement with the experimental results. The superconducting transition temperatures in this phase are found to agree with the measured values, too. This discovery provides insights into the unusual superconducting behavior reported for silane.
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