Publication Date:
2018-05-03
Description:
Author(s): Y. S. Kushnirenko, A. V. Fedorov, E. Haubold, S. Thirupathaiah, T. Wolf, S. Aswartham, I. Morozov, T. K. Kim, B. Büchner, and S. V. Borisenko Detailed knowledge of the gap function in iron-based superconductors is a requisite to identify the mechanism of superconductivity in these materials. Here, the authors present a systematic study of the superconducting gap distribution on the three-dimensional Fermi surfaces of FeSe using synchrotron-based angle-resolved photoemission spectroscopy. The results imply a significant anisotropy of the superconducting gap on all parts of the FeSe Fermi surface not only in-plane, but also as a function of k z . The observed in-plane anisotropy can be qualitatively understood in terms of orbital-selective Cooper pairing and nematicity-induced mixing of s - and d -pairing channels. [Phys. Rev. B 97, 180501(R)] Published Wed May 02, 2018
Keywords:
Superfluidity and superconductivity
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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