Heat transport in proximity structures

Details Heat transport in proximity structures Heat transport in proximity structures

2003-03-18

arxiv.org/abs/cond-mat/0303344v2

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, minor revision, to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.91.137002

We study heat and charge transport through a normal diffusive wire coupled with a superconducting wire over the region smaller than the coherence length. Due to partial Andreev reflection of quasiparticles from the interface, the subgap thermal flow is essentially suppressed and approaches zero along with energy, which is specific for diffusive structures. Whereas the electric conductance shows conventional reentrance effect, the thermal conductance rapidly decreases with temperature which qualitatively explains the results of recent experiments. In the Andreev interferometer geometry, the thermal conductance experiences full-scale oscillations with the order parameter phase difference.

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