The role of Coulomb interaction in the superconducting properties of CaC6 and H under pressure
作者： S Massidda , F Bernardini , C Bersier , A Continenza , P Cudazzo
DOI: 10.1088/0953-2048/22/3/034006
关键词: Superconductivity 、 Condensed matter physics 、 Coulomb repulsion 、 Graphite 、 Anisotropy 、 Physics 、 Ab initio 、 Basis (linear algebra) 、 Density functional theory 、 Coulomb
摘要: Superconductivity in intercalated graphite CaC6 and H under extreme pressure is discussed the framework of superconducting density functional theory. A detailed analysis how electron–phonon electron–electron interactions combine together to determine gap critical temperature (Tc) these systems presented. In particular, we discuss effect on calculated Tc anisotropy interaction different approximations for screening Coulomb repulsion. These results contribute understanding multigap anisotropic superconductivity, which has received a lot attention since discovery MgB2, show it possible describe properties real materials fully ab initio basis.
arxiv-vanity.com
core.ac.uk
harvard.edu
lincoln.ac.uk
mpg.de 
arxiv.org 参考文章(45)
S. Kurth, M.A.L. Marques, E.K.U. Gross, Density-Functional Theory Reference Module in Materials Science and Materials Engineering#R##N#Encyclopedia of Condensed Matter Physics. pp. 395- 402 ,(2005) , 10.1016/B0-12-369401-9/00445-9
Chandrabhas Narayana, Huan Luo, Jon Orloff, Arthur L. Ruoff, Solid hydrogen at 342 GPa: no evidence for an alkali metal Nature. ,vol. 393, pp. 46- 49 ,(1998) , 10.1038/29949
A. Floris, A. Marini, A. Sanna, E. K. U. Gross, G. Profeta, S. Massidda, Anisotropic gap of superconducting CaC6 : A first-principles density functional calculation Physical Review B. ,vol. 75, ,(2007)
M Lüders, MAL Marques, NN Lathiotakis, Andrea Floris, Gianni Profeta, L Fast, Alessandra Continenza, S Massidda, EKU Gross, None, Ab initio theory of superconductivity. I. Density functional formalism and approximate functionals Physical Review B. ,vol. 72, pp. 024545- ,(2005) , 10.1103/PHYSREVB.72.024545
JS Kim, RK Kremer, Lilia Boeri, FS Razavi, None, Specific Heat of the Ca-Intercalated Graphite Superconductor CaC 6 Physical Review Letters. ,vol. 96, pp. 217002- 217200 ,(2006) , 10.1103/PHYSREVLETT.96.217002
O. -J. Wacker, R. Kümmel, E. K. U. Gross, Time-Dependent Density-Functional Theory for Superconductors Physical Review Letters. ,vol. 73, pp. 2915- 2918 ,(1994) , 10.1103/PHYSREVLETT.73.2915
Gábor Csányi, P. B. Littlewood, Andriy H. Nevidomskyy, Chris J. Pickard, B. D. Simons, The role of the interlayer state in the electronic structure of superconducting graphite intercalated compounds Nature Physics. ,vol. 1, pp. 42- 45 ,(2005) , 10.1038/NPHYS119
J. R. Schrieffer, D. J. Scalapino, J. W. Wilkins, Effective Tunneling Density of States in Superconductors Physical Review Letters. ,vol. 10, pp. 336- 339 ,(1963) , 10.1103/PHYSREVLETT.10.336
J. P. Carbotte, Properties of boson-exchange superconductors Reviews of Modern Physics. ,vol. 62, pp. 1027- 1157 ,(1990) , 10.1103/REVMODPHYS.62.1027
Chris J. Pickard, Richard J. Needs, Structure of phase III of solid hydrogen Nature Physics. ,vol. 3, pp. 473- 476 ,(2007) , 10.1038/NPHYS625