標題: Magnetoconductance oscillations in semiconductor-superconductor junctions with a laterally isolating barrier layer inside semiconductor region
作者: Hsue, YC
Yang, TJ
Gu, BY
Wang, J
電子物理學系
Department of Electrophysics
公開日期: 1-Jul-2003
摘要: 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 delta-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.
URI: http://dx.doi.org/10.1140/epjb/e2003-00217-1
http://hdl.handle.net/11536/27738
ISSN: 1434-6028
DOI: 10.1140/epjb/e2003-00217-1
期刊: EUROPEAN PHYSICAL JOURNAL B
Volume: 34
Issue: 2
起始頁: 237
結束頁: 246
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