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First-principles-based $\pm s$-wave modelling for iron-based superconductors:Studies for specific heat and nuclear magnetic relaxation rate

Authors
  • Nakai, N.
  • Nakamura, H.
  • Ota, Y.
  • Nagai, Y.
  • Hayashi, N.
  • Machida, M.
Type
Preprint
Publication Date
Sep 07, 2009
Submission Date
Sep 07, 2009
Identifiers
DOI: 10.1103/PhysRevB.82.094501
Source
arXiv
License
Yellow
External links

Abstract

In order to consistently explain controversial experimental results on superconducting states observed by different probes in typical iron-based superconductors, we construct a realistic multi-band $\pm s$-wave pairing model by combining the quasiclassical formalism with the first-principles calculation. The model successfully resolves the controversies in contrast to the fact that simplified models such as two-band $\pm s$-wave one fail to do. A key in the model is the existence of relatively small gaps which leads to material-dependent peculiarities.

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