Physics – Condensed Matter – Superconductivity
Scientific paper
2010-02-17
Phys. Rev. B 81, 184512 (2010)
Physics
Condensed Matter
Superconductivity
8 pages, 6 figures, 1 table, RevTex4, references updated
Scientific paper
10.1103/PhysRevB.81.184512
We reiterate, in more details, our previous proposal of using quasi-particle 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$_{\pm}$, with nodes on electron Fermi surfaces. For Fe(Se,Te) system we found fully gapped s$_{\pm}$ 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.
Lee Dung-Hai
Wang Faming
Zhai Hui
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