Using both two orbital and five orbital models, we investigate the quasiparticle interference (QPI) patterns in the superconducting (SC) state of iron-based superconductors. We compare the results for nonmagnetic and magnetic impurities in sign-changed s -wave cos (kx) cos (ky) and sign-unchanged | cos (kx) cos (ky) | SC states. While the patterns strongly depend on the chosen band structure details, the sensitivity of peaks around (±π,0) and (0,±π) wave vectors on magnetic or nonmagnetic impurities, and on sign-changed or sign-unchanged SC orders is a common feature. Our results suggest that the QPI can provide evidence of the pairing symmetry in the SC states.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Sep 29 2009|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics