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

Abstract

We show that a magnetic field can influnce 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.

5 pages, 3 figures, revised version with a new title

References in corpus (7)

• Random-Matrix Theory of Quantum Transport
• Long-Range Coherence in a Mesoscopic Metal near a Superconducting Interface
• Proximity and Josephson effects in superconductor - two dimensional electron gas planar junctions
• Coherent low-energy charge transport in a diffusive S-N-S junction
• Low temperature thermal properties of mesoscopic normal-metal/superconductor heterostructures
• Reentrant behavior in the superconducting phase-dependent resistance of a disordered 2-dimensional electron gas
• Negative Magnetoresistance in Andreev Interferometers

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