The role of Coulomb interaction in the superconducting properties of CaC6and H under pressure

Massidda, S. and Bernardini, F. and Bersier, C. and Continenza, A. and Cudazzo, P. and Floris, A. and Glawe, H. and Monni, M. and Pittalis, S. and Profeta, G. and Sanna, A. and Sharma, S. and Gross, E. K. U. (2009) The role of Coulomb interaction in the superconducting properties of CaC6and H under pressure. Superconductor Science and Technology, 22 (3). 034006. ISSN 0953-2048

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Item Type:Article
Item Status:Live Archive

Abstract

Superconductivity in intercalated graphite CaC6 and H under extreme pressure is discussed in the framework of superconducting density functional theory. A detailed analysis of how the electron–phonon and electron–electron interactions combine together to determine the superconducting gap and critical temperature (Tc) of these systems is presented. In particular, we discuss the effect on the calculated Tc of the anisotropy of the electron–phonon interaction and of the different approximations for screening the Coulomb repulsion. These results contribute to the understanding of multigap and anisotropic superconductivity, which has received a lot of attention since the discovery of MgB2, and show how it is possible to describe the superconducting properties of real materials on a fully ab initio basis.

Keywords:Superconductivity
Subjects:F Physical Sciences > F321 Solid state Physics
Divisions:College of Science > School of Mathematics and Physics
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ID Code:22801
Deposited On:07 Jun 2016 15:05

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