Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102196
Title: Highly Anisotropic and Twofold Symmetric Superconducting Gap in Nematically Ordered FeSe0.93 S0.07
Authors: Xu, H. C.
Niu, X. H.
Xu, D. F.
Jiang, J.
Yao, Q.
Chen, Q. Y.
Song, Q.
Abdel-Hafiez, M.
Chareev, D. A.
Vasiliev, A. N.
Wang, Q. S.
Wo, H. L.
Zhao, J.
Peng, R.
Feng, D. L.
Issue Date: 2016
Publisher: American Physical Society
Citation: Highly Anisotropic and Twofold Symmetric Superconducting Gap in Nematically Ordered FeSe0.93 S0.07 / H. C. Xu, X. H. Niu, D. F. Xu, et al. — DOI 10.1103/PhysRevLett.117.157003 // Physical Review Letters. — 2016. — Vol. 117. — Iss. 15. — 157003.
Abstract: FeSe exhibits a novel ground state in which superconductivity coexists with a nematic order in the absence of any long-range magnetic order. Here, we report on an angle-resolved photoemission study on the superconducting gap structure in the nematic state of FeSe0.93S0.07, without the complications caused by Fermi surface reconstruction induced by magnetic order. We find that the superconducting gap shows a pronounced twofold anisotropy around the elliptical hole pocket near Z (0, 0, π), with gap minima at the end points of its major axis, while no detectable gap is observed around Γ (0, 0, 0) and the zone corner (π, π, kz). The large anisotropy and nodal gap distribution demonstrate the substantial effects of the nematicity on the superconductivity and thus put strong constraints on current theories. © 2016 American Physical Society.
Keywords: EDGE DETECTION
GROUND STATE
ANGLE-RESOLVED PHOTOEMISSION
ELLIPTICAL HOLES
GAP DISTRIBUTION
LARGE ANISOTROPY
LONG RANGE MAGNETIC ORDER
MAGNETIC ORDERS
SUPERCONDUCTING GAP STRUCTURE
SUPERCONDUCTING GAPS
ANISOTROPY
URI: http://hdl.handle.net/10995/102196
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84992052022
PURE ID: 1231646
ISSN: 319007
DOI: 10.1103/PhysRevLett.117.157003
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

Files in This Item:
File Description SizeFormat 
2-s2.0-84992052022.pdf717,38 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.