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

  • Young-Chung Hsue
  • Tzong-Jer Yang
  • Ben-Yuan GuEmail author
  • Jian Wang
Original Paper

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 \(\delta-\)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.

Keywords

Reflection Wave Function Potential Barrier Propagation Mode Barrier Layer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • Young-Chung Hsue
    • 1
  • Tzong-Jer Yang
    • 1
  • Ben-Yuan Gu
    • 2
    Email author
  • Jian Wang
    • 3
  1. 1.Department of ElectrophysicsNational Chiao Tung UniversityHsinchuTaiwan
  2. 2.Institute of PhysicsThe Chinese Academy of SciencesBeijingPR China
  3. 3.Department of PhysicsThe University of Hong KongHong KongPR China

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