Superconducting properties in the topological superconductor candidate PbTaSe<sub>2</sub> family

ORAL

Abstract

Nodal line semimetals are novel quantum states of matter, hosting topological nodal rings in the bulk band structures. Among the nodal line semimetals, PbTaSe2 family without the inversion symmetry in the crystal structure has been reported to be superconducting, and can be a promising platform for the study of topological superconductivity [1,2]. Here we present the superconducting properties of single crystals of PbTaSe2 family. Our resistivity measurements under high magnetic fields reveal the unusual temperature dependence and magnitude of the upper critical field in this family, strikingly distinct from those for conventional BCS-type superconductors. Compering theoretical models, we will discuss the possible superconducting pairing symmetry realized in this family.


[1] M.N. Ali et al., Phys. Rev. B 89 020505 (2014).
[2] G. Bian et al., Nat. Commun. 7, 10556 (2016).

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Presenters

  • RIFFAT MUNIR

    • University of Central Florida

Authors

  • RIFFAT MUNIR

    • University of Central Florida

  • K A M Hasan Siddiquee

    • University of Central Florida

  • Charuni Dissanayake

    • University of Central Florida

  • Xinzhe Hu

    • Department of Physics, University of Florida
    • Physics, University of Florida
    • University of Florida

  • Yasumasa Takano

    • Department of Physics, University of Florida
    • University of Florida
    • Physics, University of Florida

  • Eun Sang Choi

    • National High Magnetic Field Laboratory, Florida State University
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University
    • National High Magnetic Field Lab
    • Physics, Florida State University
    • National High Field Magnet Laboratory
    • Florida Sate University

  • Yasuyuki Nakajima

    • University of Central Florida