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Anomalous temperature evolution of the electronic structure of FeSe

DOI: 10.1103/PhysRevB.96.100504 DOI Help

Authors: Y. S. Kushnirenko (IFW Dresden) , A. A. Kordyuk (Institute of Metal Physics of National Academy of Sciences of Ukraine) , A. V. Fedorov (IFW Dresden; Universität zu Köln) , E. Haubold (IFW Dresden) , T. Wolf (Institute for Solid State Physics, Karlsruhe Institute of Technology) , B. Büchner (IFW Dresden) , S. V. Borisenko (IFW Dresden)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 96

State: Published (Approved)
Published: September 2017
Diamond Proposal Number(s): 11543

Abstract: We present angle-resolved photoemission spectroscopy data taken from the structurally simplest representative of iron-based superconductors, FeSe, in a wide temperature range. Apart from the variations related to the nematic transition, we detect very pronounced shifts of the dispersions on the scale of hundreds of degrees Kelvin. Remarkably, upon warming up the sample, the band structure has a tendency to relax to the one predicted by conventional band structure calculations, directly opposite to what is intuitively expected. Our findings shed light on the origin of the dominant interaction shaping the electronic states responsible for high-temperature superconductivity in iron-based materials.

Journal Keywords: Multiband superconductivity; ChalcogenidesPnictides; Angle-resolved photoemission spectroscopy; Condensed Matter & Materials Physics

Subject Areas: Materials, Physics


Instruments: I05-ARPES