Testing the $d_{x^2-y^2}^{\ast }$-wave pairing symmetry by quasiparticle interference in BiS${}_2$-based superconductors

Abstract

The quasiparticle interference (QPI) patterns in BiS${}_2$-based superconductors are theoretically investigated by taking into account the spin-orbital coupling and assuming the recently proposed $d_{x^2-y^2}^{\ast }$-wave pairing symmetry. We found two distinct scattering wave vectors whose evolution can be explained based on the evolution of the constant-energy contours. The QPI spectra presented in this paper can thus be compared with future scanning tunneling microscopy experiments to test whether the pairing symmetry is $d_{x^2-y^2}^{\ast }$-wave in BiS${}_2$-based superconductors.

arXiv commentDue to the size limit, the original high-resolution figures can be asked for by emailling [email protected]

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