2008/07/31 by Yunkyu Bang, Han-Yong Choi · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.78.134523
published as Phys. Rev. B 78, 134523 (2008) · Published version in Phys. Rev. B 78, 134523 (2008)
openalex publication_date 2008/10/17 · arxiv created 2008/10/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider the minimal two-band model for the Fe-based superconductors with a phenomenological pairing interaction which mimics short-range antiferromagnetic fluctuations. Two superconducting (SC) gap solutions are found to exist with the model: sign-changing s-wave gap (\ifmmode±\else\textpm\fis wave) and double d-wave gap states. Both solutions hold the approximate relation \ensuremathΔhmaxNh\ensuremath≈\ensuremathΔemaxNe, a generic feature of two-band model with a dominant interband pairing interaction. We carried out the calculations of the SC properties of the both SC states such as the density of states, temperature dependencies of spin-lattice relaxation rate 1/T1, Knight shift, and penetration depth, particularly taking into account of the interband coherence factors. The results are discussed in comparison with the currently available experimental data.