Magnetoconductance oscillations in semiconductor-superconductor junctions with a laterally isolating barrier layer inside semiconductor region View Full Text


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Article Info

DATE

2003-07

AUTHORS

Young-Chung Hsue, Tzong-Jer Yang, Ben-Yuan Gu, Jian Wang

ABSTRACT

.The oscillatory characteristics of magnetoconductance for a junction composed of a superconductor and a semiconductor, in which two parallel quantum wave guides are coupled with each other through a potential barrier layer, are studied systematically. To model the imperfectness of the interface, we introduce a \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\delta-$\end{document}function scattering potential barrier lying close to the interface of the junction. The magnetoconductance oscillations (MCO) in this system stem from two sources: one is the interference of wave functions of quasi-particles due to multiple Andreev reflections at the interface; the other is attributed to the variation of the number of the propagation modes when introducing the isolating barrier layer. The introduction of the isolating layer in the quantum wave-guides strongly modifies MCO. We also present a physical picture for the MCO based on a phenomenological argument. The theoretically fitted results are in good agreement with numerical ones. More... »

PAGES

237-246

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjb/e2003-00217-1

DOI

http://dx.doi.org/10.1140/epjb/e2003-00217-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1011326197


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