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Pure equal-spin and opposite-spin crossed Andreev reflection in spin-orbit-coupled graphene

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  • Weiwei Yan

    (Nanjing University)

  • W. Zeng

    (Nanjing University)

  • R. Shen

    (Nanjing University
    Nanjing University)

Abstract

We theoretically investigate the nonlocal transport in the ferromagnet/s-wave superconductor/Rashba spin-orbit coupled region/ferromagnet hybrid junction composed of the gapped graphene lattices. The equal-spin crossed Andreev reflection (ECAR) and the opposite-spin crossed Andreev reflection (OCAR) can be generated separately. The ECAR dominant transport and the OCAR dominant one appear for the junction with antiparallel and parallel magnetization of two ferromagnetic leads, respectively. The pure ECAR (OCAR) is achieved not only at the Dirac point but over a large voltage range, suggesting the highly efficient nonlocal splitting of the Cooper pairs with spin-triplet (spin-singlet) pairing correlations. Graphic abstract

Suggested Citation

  • Weiwei Yan & W. Zeng & R. Shen, 2023. "Pure equal-spin and opposite-spin crossed Andreev reflection in spin-orbit-coupled graphene," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 96(6), pages 1-7, June.
    • Handle: RePEc:spr:eurphb:v:96:y:2023:i:6:d:10.1140_epjb_s10051-023-00555-6
    DOI: 10.1140/epjb/s10051-023-00555-6
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