Comment on "Anisotropic s-wave superconductivity in MgB_2"

Details Comment on "Anisotropic s-wave superconductivity in MgB_2" Comment on "Anisotropic s-wave superconductivity in MgB_2"

2002-04-25

arxiv.org/abs/cond-mat/0204545v1

Physics

Condensed Matter

Superconductivity

1 page, 1 figure, REVTeX 4, to be submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.066501

An analytical result for renormalization of the jump of the heat capacity Delta C/C_N by the anisotropy of the order parameter is derived in the framework of the model proposed by Haas and Maki [Phys. Rev. B 65, 020502(R) (2001)], for both prolate and oblate anisotropy. The graph of Delta C/C_N versus the ratio of the gaps on the equator and the pole, Delta_e/Delta_p, of the Fermi surface allows a direct determination of the gap anisotropy parameter Delta_e/Delta_p using data from specific heat measurements.

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