Anisotropic gap of superconductingCaC6: Aafirst-principles density functional calculation

Sanna, A. and Profeta, G. and Floris, A. and Marini, A. and Gross, E. K. U. and Massidda, S. (2007) Anisotropic gap of superconductingCaC6: Aafirst-principles density functional calculation. Physical Review B, 75 (2). ISSN 2469-9950

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Item Type:Article
Item Status:Live Archive

Abstract

We report first-principles calculations of the superconducting properties of CaC6, obtained within the density functional theory of superconductivity. We find a moderately anisotropic gap which is larger on the Fermi surface sheet with interlayer and Ca character compared with isotropic calculations. Our calculated anisotropy improves the agreement with specific heat experiments and is consistent with recent tunneling experiments. In contrast to MgB2, we do not find multigap superconductivity but, instead, a continuous spread of gap values.

Keywords:Superconductors
Subjects:F Physical Sciences > F300 Physics
Divisions:College of Science > School of Mathematics and Physics
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ID Code:22804
Deposited On:02 Jun 2016 12:31

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