Momentum dependence and nodes of the superconducting gap in the iron pnictides

A. V. Chubukov, M. G. Vavilov, A. B. Vorontsov

Research output: Contribution to journalArticle

129 Scopus citations

Abstract

Using general symmetry arguments and model calculations we analyze the superconducting gap in materials with multiple Fermi-surface pockets, with applications to iron pnictides. We show that the gap in the pnictides has an extended s -wave symmetry but is either nodeless or has nodes, depending on the interplay between intraband and interband interactions. We argue that the nodes in the gap emerge without a phase transition as the tendency toward a spin-density-wave order gets weaker. These findings provide a way to reconcile seemingly conflicting results of numerical and experimental studies of the pnictides.

Original languageEnglish (US)
Article number140515
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number14
DOIs
StatePublished - Oct 29 2009

Fingerprint Dive into the research topics of 'Momentum dependence and nodes of the superconducting gap in the iron pnictides'. Together they form a unique fingerprint.

  • Cite this