Y. Yao et al 2007 EPL 78 37003 doi:10.1209/0295-5075/78/37003
Superconductivity in high-pressure SiH4
Y. Yao1, J. S. Tse1, Y. Ma2 and K. Tanaka1
Show affiliationsA combination of static and dynamical first-principles electronic calculations of silane, SiH4, at high pressure has revealed a novel monoclinic structure with C2/c symmetry. This high-pressure phase is metallic and composed of layers of SiH4 bridged by H bonds. Perturbative linear response calculations at 90 and 125 GPa predict large electron-phonon couplings yielding an electron-phonon coupling parameter λ close to 0.9. The application of McMillan equation gives a superconducting critical temperature (Tc) between 45 and 55 K.
- PACS
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74.10.+v Occurrence, potential candidates
74.70.Ad Metals; alloys and binary compounds (including A15, MgB2, etc.)
- Subjects
- Dates
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Issue 3 (May 2007)
Received 15 December 2006, in final form 23 March 2007
Published 20 April 2007
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Superconductivity in high-pressure SiH4
Y. Yao et al 2007 EPL 78 37003
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