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TT: Fachverband Tiefe Temperaturen
TT 32: Superconductivity: Theory 2
TT 32.4: Vortrag
Mittwoch, 18. März 2020, 10:15–10:30, HSZ 103
Weak localization corrections to the thermal conductivity in s-wave superconductors — •Lucia Gonzalez Rosado1,2, Fabian Hassler2, and Gianluigi Catelani1 — 1JARA Institute for Quantum Information (PGI-11), Forschungszentrum Jülich, 52425 Jülich, Germany — 2JARA Institute for Quantum Information, RWTH Aachen University, 52056 Aachen, Germany
We study thermal conductivity in disordered conventional superconductors, focusing on the weak localization (WL) effect and using a Green’s function diagrammatic technique in Nambu space. We obtain the WL correction to the thermal conductivity from the diffusive behavior of the low-energy modes, and calculate it explicitly in two dimensions, both for fixed phase-coherence length and for fixed phase-coherence time. We show that the correction depends in some temperature regimes on an emergent energy scale ε*. We show that this scale is experimentally measurable for dirty superconductors at high temperatures.