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Three-dimensional superconducting gap in FeSe from angle-resolved photoemission spectroscopy

DOI: 10.1103/PhysRevB.97.180501 DOI Help

Authors: Y. S. Kushnirenko (IFW Dresden) , A. V. Fedorov (IFW Dresden) , E. Haubold (IFW Dresden) , S. Thirupathaiah (IFW Dresden; Indian Institute of Science) , T. Wolf (Institute for Solid State Physics, Karlsruhe Institute of Technology) , S. Aswartham (IFW Dresden) , I. Morozov (IFW Dresden; Lomonosov Moscow State University) , T. K. Kim (Diamond Light Source) , B. B├╝chner (IFW Dresden) , S. V. Borisenko (IFW Dresden)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 97

State: Published (Approved)
Published: May 2018
Diamond Proposal Number(s): 11643 , 18586

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 an additional refinement of the theoretical approaches.

Journal Keywords: Multiband superconductivity; Chalcogenides; Pnictides; Angle-resolved photoemission spectroscopy

Subject Areas: Materials, Physics


Instruments: I05-ARPES