中国物理B ›› 2005, Vol. 14 ›› Issue (6): 1209-1216.doi: 10.1088/1009-1963/14/6/026

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Zeeman effects on the coherent tunnelling conductance in normal-metal/superconductor/normal-metal double tunnel junctions

董正超   

  1. Department of Physics, Huaiyin Teachers College,Huaian 223001,China;Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials,Huaian 223001,China
  • 收稿日期:2004-11-18 修回日期:2005-02-24 出版日期:2005-05-27 发布日期:2005-05-27
  • 基金资助:
    Project supported by the Postdoctoral Research Fonds of Jiangsu Province, and the "33"Project Funds of Jiangsu Province, China

Zeeman effects on the coherent tunnelling conductance in normal-metal/superconductor/normal-metal double tunnel junctions

Dong Zheng-Chao (董正超)   

  1. Department of Physics, Huaiyin Teachers College,Huaian 223001,China;Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials,Huaian 223001,China
  • Received:2004-11-18 Revised:2005-02-24 Online:2005-05-27 Published:2005-05-27
  • Supported by:
    Project supported by the Postdoctoral Research Fonds of Jiangsu Province, and the "33"Project Funds of Jiangsu Province, China

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摘要： The coherent quantum transport is investigated in normal-metal/superconductor/normal-metal(N/S/N) double tunnel junctions under a Zeeman magnetic field on the S.Taking simultaneously into account the electron-injected current from one Nelectrode and the hole-injected current from the other Nelectrode,we derive a general formulafor the differential conductance in the N/S/N system.It is shown that the conductance spectrum exhibits oscillatory behaviour with the bias voltage, and the oscillation amplitude is reduced wiht increasing temperature and Zeeman magneti field, the Zeeman energy can lead to the Zeeman splitting of conductance peaks.In the tunnel limit, a series of bound states of quasiparticles will form in the S.

Abstract: The coherent quantum transport is investigated in normal-metal/superconductor/normal-metal(N/S/N) double tunnel junctions under a Zeeman magnetic field on the S.Taking simultaneously into account the electron-injected current from one Nelectrode and the hole-injected current from the other Nelectrode,we derive a general formulafor the differential conductance in the N/S/N system.It is shown that the conductance spectrum exhibits oscillatory behaviour with the bias voltage, and the oscillation amplitude is reduced wiht increasing temperature and Zeeman magneti field, the Zeeman energy can lead to the Zeeman splitting of conductance peaks.In the tunnel limit, a series of bound states of quasiparticles will form in the S.

Key words: Zeeman effect, coherent effect, normal-mtea/superconductor/normal-metal tunnel junctions

中图分类号:  (Proximity effects; Andreev reflection; SN and SNS junctions)

  • 74.45.+c
71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 73.40.Gk (Tunneling) 74.25.Ha (Magnetic properties including vortex structures and related phenomena) 74.25.Gz (Optical properties)