In-gap bound states induced by nonmagnetic impurities in two-band s± superconductors

T. K. Ng, Y. Avishai

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The physics of single nonmagnetic impurity immersed in a two-band s -wave superconductor with relative phase δ 0 between its two order parameters is studied and elucidated. It is shown that midgap bound states are always induced by nonmagnetic impurities when δ=π (s± -wave superconductors). These bound states emerge as a consequence of the topological nature of the corresponding Bogoliubov-de Gennes equation.

Original languageEnglish
Article number104504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number10
DOIs
StatePublished - 9 Sep 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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