Y. Yao et al 2007 EPL 78 37003 doi:10.1209/0295-5075/78/37003
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.
74.10.+v Occurrence, potential candidates
74.70.Ad Metals; alloys and binary compounds (including A15, MgB2, etc.)
Issue 3 (May 2007)
Received 15 December 2006, in final form 23 March 2007
Published 20 April 2007
Y. Yao et al 2007 EPL 78 37003
M A Morrison et al 1984 J. Phys. B: At. Mol. Phys. 17 2725
R. A. M. J. Wijers and T. J. Galama 1999 ApJ 523 177
D A Drabold and G L Jones 1991 J. Phys. A: Math. Gen. 24 4705
Alexei Borodin and Eugene Kanzieper 2007 J. Phys. A: Math. Theor. 40 F849
A. Crapsi et al. 2005 ApJ 619 379
D S Dean et al 2004 J. Phys. A: Math. Gen. 37 10459
M. Brüggen et al 2005 ApJ 631 L21
D P Chakraborty 2006 Phys. Med. Biol. 51 3449
George Horton and Chris Dewdney 2004 J. Phys. A: Math. Gen. 37 11935