Impurity bound states and disorder-induced orbital and magnetic order in the s ± state of Fe-based superconductors

Maria N. Gastiasoro, Brian M. Andersen

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We study the presence of impurity bound states within a five-band Hubbard model relevant to iron-based superconductors. In agreement with earlier studies, we find that in the absence of Coulomb correlations there exists a range of repulsive impurity potentials where in-gap states are generated. In the presence of weak correlations, these states are generally pushed to the edges of the gap, whereas for larger correlations the on-site impurity potential induces a local magnetic region, which reintroduces the low-energy bound states into the gap.

Original languageEnglish (US)
Pages (from-to)2651-2655
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Volume26
Issue number8
DOIs
StatePublished - Aug 2013

Bibliographical note

Funding Information:
Acknowledgements B.M.A. acknowledges support from The Danish Council for Independent Research | Natural Sciences.

Keywords

  • Impurity states
  • Induced order
  • Iron pnictides
  • Superconductivity

Fingerprint Dive into the research topics of 'Impurity bound states and disorder-induced orbital and magnetic order in the s <sub>±</sub> state of Fe-based superconductors'. Together they form a unique fingerprint.

Cite this