Properties of Josephson junctions involving the cos (kx) cos (ky) pairing state in iron pnictides

Wei Feng Tsai, Dao Xin Yao, B. Andrei Bernevig, Jiangping Hu

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

We propose a trilayer π -junction that takes advantage of the unconventional s x2 y2 =cos kx cos ky pairing symmetry which changes sign between electron and hole Fermi pockets in the iron pnictides. In addition, we also present theoretical results for Andreev bound states in thin superconductor-normal metal (or insulator) iron-pnictide junctions. The presence of nontrivial in-gap states, which uniquely appear in this unconventional pairing state, is a distinct feature in comparison to other singlet pairing states.

Original languageEnglish (US)
Article number012511
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number1
DOIs
StatePublished - Aug 6 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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