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Pairing-dependent superconductivity gap and nonholonomic Andreev reflection in Weyl semimetal/Weyl superconductor heterojunctions

Journal Article


Abstract


  • We study superconductivity states mediated by the BCS and Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairings in superconducting Weyl semimetals. It is found that a mixture of BCS and FFLO pairings results in a distinctive double-gap structure for superconducting states. With a heterojunction of a Weyl semimetal and a superconducting Weyl semimetal, we demonstrate the nonholonomic Andreev reflection and show that the intra- and internode Andreev reflections increase at the edges of the effective gap. The influence of interface potentials on the Andreev reflections is investigated. The conductance spectra arising from the mixed superconducting pairings is also analyzed.

Authors


  •   Fang, Jun (external author)
  •   Duan, Wenye (external author)
  •   Liu, Junfeng (external author)
  •   Chao Zhang
  •   Ma, Zhongshui (external author)

Publication Date


  • 2018

Citation


  • Fang, J., Duan, W., Liu, J., Zhang, C. & Ma, Z. (2018). Pairing-dependent superconductivity gap and nonholonomic Andreev reflection in Weyl semimetal/Weyl superconductor heterojunctions. Physical Review B: Covering condensed matter and materials physics, 97 (16), 165301-1-165301-9.

Scopus Eid


  • 2-s2.0-85045192253

Start Page


  • 165301-1

End Page


  • 165301-9

Volume


  • 97

Issue


  • 16

Place Of Publication


  • United States

Abstract


  • We study superconductivity states mediated by the BCS and Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairings in superconducting Weyl semimetals. It is found that a mixture of BCS and FFLO pairings results in a distinctive double-gap structure for superconducting states. With a heterojunction of a Weyl semimetal and a superconducting Weyl semimetal, we demonstrate the nonholonomic Andreev reflection and show that the intra- and internode Andreev reflections increase at the edges of the effective gap. The influence of interface potentials on the Andreev reflections is investigated. The conductance spectra arising from the mixed superconducting pairings is also analyzed.

Authors


  •   Fang, Jun (external author)
  •   Duan, Wenye (external author)
  •   Liu, Junfeng (external author)
  •   Chao Zhang
  •   Ma, Zhongshui (external author)

Publication Date


  • 2018

Citation


  • Fang, J., Duan, W., Liu, J., Zhang, C. & Ma, Z. (2018). Pairing-dependent superconductivity gap and nonholonomic Andreev reflection in Weyl semimetal/Weyl superconductor heterojunctions. Physical Review B: Covering condensed matter and materials physics, 97 (16), 165301-1-165301-9.

Scopus Eid


  • 2-s2.0-85045192253

Start Page


  • 165301-1

End Page


  • 165301-9

Volume


  • 97

Issue


  • 16

Place Of Publication


  • United States