Quasiparticle scattering interference in superconducting iron pnictides

Yan Yang Zhang, Chen Fang, Xiaoting Zhou, Kangjun Seo, Wei Feng Tsai, B. Andrei Bernevig, Jiangping Hu

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

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 languageEnglish (US)
Article number094528
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number9
DOIs
StatePublished - Sep 29 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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