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Shifts and splittings of the hole bands in the nematic phase of FeSe
Authors:
Matthew
Watson
(Diamond Light Source)
,
Amir A.
Haghighirad
(University of Oxford)
,
Hitoshi
Takita
(Hiroshima University)
,
Wumiti
Mansuer
(Hiroshima University)
,
Hideaki
Iwasawa
(Diamond Light Source; Hiroshima Synchrotron Radiation)
,
Eike F.
Schwier
(Hiroshima Synchrotron Radiation)
,
Akihiro
Ino
(Hiroshima University; Hiroshima Synchrotron Radiation)
,
Moritz
Hoesch
(Diamond Light Source; Hiroshima Synchrotron Radiation)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of The Physical Society Of Japan
, VOL 86
State:
Published (Approved)
Published:
May 2017

Abstract: We report a high-resolution laser-based angle-resolved photoemission spectroscopy (laser-ARPES) study of single crystals of FeSe, focusing on the temperature-dependence of the hole-like bands around the Γ point. As the system cools through the tetragonal–orthorhombic “nematic” structural transition at 90 K, the splitting of the dxz/dyz bands is observed to increase by a magnitude of 13 meV. Moreover, the onset of a ∼10 meV downward shift of the dxy band is also observed at 90 K. These measurements provide clarity on the nature, magnitude and temperature-dependence of the band shifts at the Γ point in the nematic phase of FeSe.
Subject Areas:
Physics,
Materials
Facility: Hiroshima Synchrotron Radiation Center
Added On:
10/04/2017 16:29
Documents:
JPSJ.86.pdf
Discipline Tags:
Superconductors
Quantum Materials
Physics
Hard condensed matter - structures
Materials Science
Technical Tags: