Abstract
The quasiparticle interference (QPI) patterns in -based superconductors are theoretically investigated by taking into account the spin-orbital coupling and assuming the recently proposed -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 -wave, -wave, and extended -wave cases and propose to further measure the Knight shift to distinguish the -wave pairing from the -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 wave in -based superconductors.
11 More- Received 5 May 2014
- Revised 31 July 2014
DOI:https://doi.org/10.1103/PhysRevB.90.054518
©2014 American Physical Society