Mesoscopic effects in the heat conductance of superconducting-normal-superconducting and normal-superconducting junctions
Journal article, 2019

We study the heat conductance of hybrid superconducting junctions. Our analysis involves single-channel junctions with arbitrary transmission as well as diffusive connectors and shows the influence of the superconducting gaps and phases of the contacts on the heat conductance. If the junction is diffusive, these effects are completely quenched on average, however, we find that their influence persists in weak-localization corrections and conductance fluctuations. While these statistical properties strongly deviate from the well-known analogs for the charge conductance, we demonstrate that the heat conductance fluctuations maintain a close to universal behavior. We find a generalized Wiedemann-Franz law for Josephson junctions with equal gaps and vanishing phase difference.

electrons

tunnel junctions

hot electron bolometer

Author

Fatemeh Hajiloo

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Fabian Hassler

RWTH Aachen University

Janine Splettstoesser

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

PHYSICAL REVIEW B

2469-9950 (ISSN) 2469-9969 (eISSN)

Vol. 99 23 235422

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Energy Engineering

Ceramics

Condensed Matter Physics

DOI

10.1103/PhysRevB.99.235422

More information

Latest update

6/29/2020