| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Non-Adiabatic Effects of Superconductor Silane under High Pressure |
FAN Wei1, WANG Jiang-Long2,1, ZOU Liang-Jian1, ZENG Zhi1 |
| 1Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031 2Department of Physics, Hebei University, Baoding 071002 |
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| Cite this article: |
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FAN Wei, WANG Jiang-Long, ZOU Liang-Jian et al 2010 Chin. Phys. Lett. 27 087402 |
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Abstract We present the investigations of non-adiabatic effects by including vertex corrections in the standard Eliashberg theory and show that high phonon frequency is unfavorable to superconductivity in the regime of strong vertex correction. This means that it is hard to find high-transition-temperature superconductors in the compounds with light elements if the non-adiabatic effects are strong. The interplay interaction between non-adiabatic effect and Coulomb interaction makes the transition temperature of silane superconductor not so high as predicted by the standard Eliashberg theory.
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| Keywords:
74.20.Fg
74.62.Fj
74.70.Ad
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Received: 26 January 2010
Published: 28 July 2010
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| PACS: |
74.20.Fg
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(BCS theory and its development)
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74.62.Fj
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(Effects of pressure)
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74.70.Ad
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(Metals; alloys and binary compounds)
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