Comment on ``Anisotropic s-wave superconductivity: comparison with experiments on MgB_2 [A. I. Posazhennikova, T. Dahm and K. Maki, cond-mat/0204272; submitted to Europhys. Lett.]

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dc.creatorMishonov, T. M.
dc.creatorPenev, E. S.
dc.creatorIndekeu, J. O.
dc.date2002-05-06
dc.date2002-05-21
dc.date.accessioned2026-07-07T02:45:20Z
dc.date.available2026-07-07T02:45:20Z
dc.descriptionAn analytical result for the renormalization of the jump of the heat capacity Delta C/C_N by the anisotropy of the order parameter is derived within the framework of the very recent model proposed by Posazhennikova, Dahm and Maki [cond-mat/0204272, submitted to Europhys. Lett.], for both oblate and prolate anisotropy. The graph of Delta C/C_N versus the ratio of the gaps on the equator and the pole of the Fermi surface, Delta_e/Δ_p, allows a direct determination of the gap anisotropy parameter Delta_e/Δ_p by fitting data from specific heat measurements Delta C/C_N. Using the experimental value Delta C/C_N=0.82 +/- 10% by Wang, Plackowski, and Junod [Physica C 355 (2001) 179] we find Delta_e/Δ_p = 4.0.
dc.description3 pages, 1 figure, LaTeX2e, submitted to Europhys. Lett.; analytical result for the relative jump of the specific heat within a two-band model added; references updated and corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0205104
dc.identifierhttp://arxiv.org/abs/cond-mat/0205104
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19263
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titleComment on ``Anisotropic s-wave superconductivity: comparison with experiments on MgB_2 [A. I. Posazhennikova, T. Dahm and K. Maki, cond-mat/0204272; submitted to Europhys. Lett.]
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