Isotropic and anisotropic description of superconducting state in CaC6 compound

被引：0
作者：
R. Szczȩśniak
E. A. Drzazga
D. Szczȩśniak
机构：
[1] Czȩstochowa University of Technology,Institute of Physics
[2] Jan Długosz University in Czȩstochowa,Institute of Physics
来源：
The European Physical Journal B | 2015年 / 88卷
关键词：
Solid State and Materials;
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摘要：
The thermodynamic parameters of the superconducting state in CaC6 have been determined in the framework of the isotropic and anisotropic Eliashberg formalism. The obtained results determine the anisotropy effect on the values of the thermodynamic functions. In particular, it has been found that the anisotropy of the electron-phonon coupling constant and the Coulomb pseudopotential significantly affects the order parameter and the wave function renormalization factor, which determines the electron effective mass. These results mean that anisotropy should be also visible in the total normalized density of states. In the case of the thermodynamic critical field, anisotropy lowers its value in the low-temperature area. On the other hand, it does not affect the specific heat jump at the critical temperature.
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