Testing the dx2y2*-wave pairing symmetry by quasiparticle interference and Knight shift in BiS2-based superconductors

Yi Gao, Tao Zhou, Huaixiang Huang, Peiqing Tong, and Qiang-Hua Wang
Phys. Rev. B 90, 054518 – Published 25 August 2014

Abstract

The quasiparticle interference (QPI) patterns in BiS2-based superconductors are theoretically investigated by taking into account the spin-orbital coupling and assuming the recently proposed dx2y2*-wave pairing symmetry. We found two distinct scattering wave vectors whose evolution can be explained based on the evolution of the constant-energy contours. In addition, we also studied the QPI spectra in the conventional s-wave, d-wave, and extended s-wave cases and propose to further measure the Knight shift to distinguish the dx2y2*-wave pairing from the d-wave one. The QPI spectra as well as the Knight shift presented in this paper can thus be compared with future scanning tunneling microscopy and NMR experiments to test whether the pairing symmetry is dx2y2* wave in BiS2-based superconductors.

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  • Received 5 May 2014
  • Revised 31 July 2014

DOI:https://doi.org/10.1103/PhysRevB.90.054518

©2014 American Physical Society

Authors & Affiliations

Yi Gao1, Tao Zhou2, Huaixiang Huang3, Peiqing Tong1, and Qiang-Hua Wang4

  • 1Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, 210023, China
  • 2College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
  • 3Department of Physics, Shanghai University, Shanghai, 200444, China
  • 4National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China

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Vol. 90, Iss. 5 — 1 August 2014

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