Abstract
Leavens and Carbotte have given a microscopic theory of gap anisotropy applicable to the case of a weak-coupling superconductor. The theory relates the anisotropy in the gap directly to Fermi surface anisotropy and anisotropy in the electron-phonon interaction. We present detailed calculations of the phonon-induced anisotropy for the case of Zn. The gap is calculated for a dense set of points on the irreducible one-twenty-fourth of the Fermi surface. From this information the average gap and the pure single-crystal critical temperature are computed and compared with the dirty-limit case. The specific heat and spin-lattice relaxation are calculated as examples of thermodynamic properties.
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Work supported by the National Research Council of Canada.
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Truant, P.T., Carbotte, J.P. Calculation of phonon-induced gap anisotropy in superconducting Zn. J Low Temp Phys 12, 31–47 (1973). https://doi.org/10.1007/BF00654723
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DOI: https://doi.org/10.1007/BF00654723