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Title: Giant Andreev Backscattering through a Quantum Point Contact Coupled via a Disordered Two-Dimensional Electron Gas to Superconductors

Abstract

We have investigated the superconducting-phase-modulated reduction in the resistance of a ballistic quantum point contact (QPC) connected via a disordered two-dimensional electron gas (2DEG) to superconductors. We show that this reduction is caused by coherent Andreev backscattering of holes through the QPC, which increases monotonically by reducing the bias voltage to zero. In contrast, the magnitude of the phase-dependent resistance of the disordered 2DEG displays a nonmonotonic reentrant behavior versus bias voltage. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
; ;  [1];  [2];  [3]
  1. Department of Applied Physics and Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
  2. Faculty of Applied Physics and Delft Institute for Microelectronics and Submicron Technology, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft (The Netherlands)
  3. Interuniversity Micro Electronics Center, Kapeldreef 75, B-3030 Leuven (Belgium)
Publication Date:
OSTI Identifier:
543870
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 79; Journal Issue: 17; Other Information: PBD: Oct 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; SUPERCONDUCTING JUNCTIONS; BACKSCATTERING; FLUX QUANTIZATION; INDIUM ARSENIDES; MAGNETORESISTANCE; NIOBIUM; ELECTRIC CONDUCTIVITY; COHERENT SCATTERING

Citation Formats

den Hartog, S G, van Wees, B J, Klapwijk, T M, Nazarov, Y V, and Borghs, G. Giant Andreev Backscattering through a Quantum Point Contact Coupled via a Disordered Two-Dimensional Electron Gas to Superconductors. United States: N. p., 1997. Web. doi:10.1103/PhysRevLett.79.3250.
den Hartog, S G, van Wees, B J, Klapwijk, T M, Nazarov, Y V, & Borghs, G. Giant Andreev Backscattering through a Quantum Point Contact Coupled via a Disordered Two-Dimensional Electron Gas to Superconductors. United States. https://doi.org/10.1103/PhysRevLett.79.3250
den Hartog, S G, van Wees, B J, Klapwijk, T M, Nazarov, Y V, and Borghs, G. 1997. "Giant Andreev Backscattering through a Quantum Point Contact Coupled via a Disordered Two-Dimensional Electron Gas to Superconductors". United States. https://doi.org/10.1103/PhysRevLett.79.3250.
@article{osti_543870,
title = {Giant Andreev Backscattering through a Quantum Point Contact Coupled via a Disordered Two-Dimensional Electron Gas to Superconductors},
author = {den Hartog, S G and van Wees, B J and Klapwijk, T M and Nazarov, Y V and Borghs, G},
abstractNote = {We have investigated the superconducting-phase-modulated reduction in the resistance of a ballistic quantum point contact (QPC) connected via a disordered two-dimensional electron gas (2DEG) to superconductors. We show that this reduction is caused by coherent Andreev backscattering of holes through the QPC, which increases monotonically by reducing the bias voltage to zero. In contrast, the magnitude of the phase-dependent resistance of the disordered 2DEG displays a nonmonotonic reentrant behavior versus bias voltage. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevLett.79.3250},
url = {https://www.osti.gov/biblio/543870}, journal = {Physical Review Letters},
number = 17,
volume = 79,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1997},
month = {Wed Oct 01 00:00:00 EDT 1997}
}