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Coherent quantum transport in normal-metal/d-wave superconductor/normal-metal double tunnel junctions

Coherent quantum transport in normal-metal/d-wave superconductor/ normal-metal double tunnel junctions
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摘要 Taking into account the effects of quantum interference and interface scattering, combining the electron current with hole current contribution to tunnel current, we study the coherent quantum transport in normal-metal/d-wave superconductor/ normal-metal (NM/d-wave SC/NM) double tunnel junctions by using extended Blonder-Tinkham-Klapwijk (BTK) approach. It is shown that all quasiparticle transport coefficients and conductance spectrum exhibit oscillating behavior with the energy, in which periodic vanishing of Andreev reflection (AR) above superconducting gap is found. In tunnel limit for the interface scattering strength taken very large, there are a series of bound states of quasiparticles formed in SC.
机构地区 Department of Physics
出处 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2004年第2期256-264,共9页 中国科学:物理学、力学、天文学(英文版)
基金 supported by the fund of the"333"Program of Jiangsu Province the National Natural Science Foundation of China(Grant No.10347129).
关键词 effects of QUANTUM interference TUNNELING spectroscopy BOUND state. effects of quantum interference tunneling spectroscopy bound state
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