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Giant Tunneling Magnetoresistance Effect in Ferromagnet/Spin-triplet Superconductor Junctions Caused by Andreev Reflection

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Abstract

We study theoretically the tunneling magnetoresistance effect in ferromagnet/chiral triplet superconductor junctions using the generalized Blonder-Tinkham-Klapwijk theory. This effect rely entirely on the dependence of Andreev reflection on the relative orientation between the magnetic moment in ferromagnet and the d-vector in spin-triplet superconductor, The tunneling differential conductance and magnetoresistance are calculated for three types of chiral p-wave gap functions, and huge tunneling magnetoresistance effect is obtained in the strong spin-polarization and low-temperature regime. This effect might provide a valuable new source of device application.

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Authors and Affiliations

  1. College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, P.O. Box 4588, Beijing, 100049, China

    Biao Jin & Qiang Cheng

  2. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China

    Yinhan Zhang

Authors
  1. Biao Jin
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  2. Qiang Cheng
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  3. Yinhan Zhang
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Correspondence to Biao Jin.

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Jin, B., Cheng, Q. & Zhang, Y. Giant Tunneling Magnetoresistance Effect in Ferromagnet/Spin-triplet Superconductor Junctions Caused by Andreev Reflection. J Low Temp Phys 164, 81–92 (2011). https://doi.org/10.1007/s10909-011-0365-x

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  • DOI: https://doi.org/10.1007/s10909-011-0365-x

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