Surface density of states of s± -wave Cooper pairs in a two-band superconductor model

Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We calculate the surface density of state (SDOS) of s± -wave Cooper pair in two-band superconductor model, where gap functions have different signs between two bands. We find that the Andreev bound state appears at surface due to the sign change in the gap function in the interband quasiparticle scattering. However, we do not obtain the zero-energy peak of SDOS in contrast to the d -wave case. The tunneling spectroscopy of s± wave is much more complex as compared to the d -wave case realized in high- Tc cuprates.

Original languageEnglish
Article number174526
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number17
DOIs
Publication statusPublished - May 1 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Surface density of states of s± -wave Cooper pairs in a two-band superconductor model'. Together they form a unique fingerprint.

Cite this