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Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

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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 Catelani11JARA 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.

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