2010/02/28 by Fa Wang, Hui Zhai, Dung-Hai Lee +1
Materials Science · Physics and Astronomy · #Crystal Structures and Properties #Iron-based superconductors research #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.81.184512
published as Phys. Rev. B 81, 184512 (2010) · 8 pages, 6 figures, 1 table, RevTex4, references updated
arxiv created 2010/05/07 · openalex publication_date 2010/05/14 · arxiv updated 2010/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We reiterate, in more details, our previous proposal of using quasiparticle interference to determine the pairing form factor in iron-based superconductors. We also present our functional renormalization group (FRG) results on LaFePO and Fe(Se,Te) superconductors. In particular, we found that the leading pairing channel in LaFePO is nodal s_\ifmmode±\else\textpm\fi with nodes on electron Fermi surfaces. For Fe(Se,Te) system we found fully gapped s_\ifmmode±\else\textpm\fi pairing with substantial gap anisotropy on electron Fermi surfaces and large gap is concentrated in regions with dominant xy orbital character. We further fit the form factor obtained by FRG to real-space orbital basis pairing picture, which shows more clearly the differences between different iron-based superconductors.