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Absence of singular superconducting fluctuation corrections to thermal conductivity

Douglas R Niven·Robert A Smith
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Abstract

We evaluate the superconducting fluctuation corrections to thermal conductivity in the normal state which diverge as T approaches T_c. We find zero total contribution for one, two and three-dimensional superconductors for arbitrary impurity concentration. The method used is diagrammatic many-body theory, and all contributions -- Aslamazov-Larkin (AL), Maki-Thompson (MT), and density-of-states (DOS) -- are considered. The AL contribution is convergent, whilst the divergences of the DOS and MT diagrams exactly cancel.

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Douglas R Niven, Robert A Smith. 2002-08-02. Absence of singular superconducting fluctuation corrections to thermal conductivity. https://doi.org/10.1103/physrevb.66.214505

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