Shifts and Splittings of the Hole Bands in the Nematic Phase of FeSe

DOI: 10.7566/JPSJ.86.053703

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

Facility: Hiroshima Synchrotron Radiation Center

Documents:
JPSJ.86.pdf