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arXiv · 1802.08668

3D superconducting gap in FeSe from ARPES

Y. S. Kushnirenko·A. V. Fedorov·E. Haubold·S. Thirupathaiah·T. Wolf·S. Aswartham·I. Morozov·T. K. Kim·B. Büchner·S. V. Borisenko
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Abstract

We present a systematic angle-resolved photoemission spectroscopy study of the superconducting gap in FeSe. The gap function is determined in a full Brillouin zone including all Fermi surfaces and kz-dependence. We find significant anisotropy of the superconducting gap in all momentum directions. While the in-plane anisotropy can be explained by both, nematicity-induced pairing anisotropy and orbital-selective pairing, the kz-anisotropy requires additional refinement of theoretical approaches.

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Y. S. Kushnirenko, A. V. Fedorov, E. Haubold, S. Thirupathaiah, T. Wolf, S. Aswartham, I. Morozov, T. K. Kim, B. Büchner, S. V. Borisenko. 2018-02-23. 3D superconducting gap in FeSe from ARPES. https://doi.org/10.1103/physrevb.97.180501

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