Magnetic field influence on the proximity effect in semiconductor-superconductor hybrid structures and their thermal conductance

Tkachov, Grygoriy and Falko, Vladimir (2004) Magnetic field influence on the proximity effect in semiconductor-superconductor hybrid structures and their thermal conductance. Physical review B, 69 (9). ISSN 1098-0121

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Abstract

We show that a magnetic field can influence the proximity effect in NS junctions via diamagnetic screening current flowing in the superconductor. Using ballistic quasi-one-dimensional (Q1D) electron channels as an example, we show that the supercurrent flow shifts the proximity-induced minigap in the excitation spectrum of a Q1D system from the Fermi level to higher quasiparticle energies. Thermal conductance of a Q1D channel (normalized by that of a normal Q1D ballistic system) is predicted to manifest such a spectral feature as a nonmonotonic behavior at temperatures corresponding to the energy of excitation into the gapful part of the spectrum.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 2004 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57029
Deposited By:
Deposited On:
24 Aug 2012 15:11
Refereed?:
Yes
Published?:
Published
Last Modified:
03 Jul 2020 00:48