First-principles calculations for anisotropy of iron-based superconductors

H. Nakamura, M. Machida, Tomio Koyama, N. Hamada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We perform first-principles calculations for anisotropy of various iron-based superconductors. The anisotropy ratio γλof the c-axis penetration depth to the ab-plane one is relatively small in BaFe2As2, LiFeAs and FeSe, indicating that the transport applications are promising in these superconductors. On the other hand, in those having perovskite-type blocking layers such as Sr2ScFePO3 we find a very large value, γλ ≳ 200, comparable to that in strongly anisotropic high-Tc cuprate Bi2Sr 2CaCu2O8 δ. Thus, the intrinsic Josephson junction stacks are expected to be formed along the c-axis, and novel Josephson effects due to the multi-gap nature are also suggested in these superconductors. We also examine the doping effect on the anisotropy of LaFeAsO.

Original languageEnglish
Pages (from-to)1066-1069
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume470
Issue number20
DOIs
Publication statusPublished - 2010 Nov 1

Keywords

  • Anisotropy
  • First-principles calculation
  • Intrinsic Josephson junction
  • Iron-based superconductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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