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.

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

References in corpus (5)

• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$
• Minimal electronic models for superconducting BiS${}_2$ layers
• Ferroelectric Soft Phonons, Charge Density Wave Instability and Strong Electron-Phonon Coupling in BiS2-Layered Superconductors
• Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
• RPA Analysis of a Two-orbital Model for the BiS2-based Superconductors