Strongly enhanced temperature dependence of the chemical potential in FeSe

Abstract

Employing a 10-orbital tight binding model, we present a new set of hopping parameters fitted directly to our latest high resolution angle-resolved photoemission spectroscopy (ARPES) data for the high temperature tetragonal phase of FeSe. Using these parameters we predict a large 10 meV shift of the chemical potential as a function of temperature. In order to confirm this large temperature dependence, we performed ARPES experiments on FeSe and observed a $\sim$25 meV rigid shift to the chemical potential between 100 K and 300 K. This unexpectedly strong shift has important implications for theoretical models of superconductivity and of nematic order in FeSe materials.

References in corpus (12)

• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Emergence of the nematic electronic state in FeSe
• Theoretical evidence for strong correlations and incoherent metallic state in FeSe
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Fermi surface of superconducting LaFePO determined by quantum oscillations
• A facility for the analysis of the electronic structures of solids and their surfaces by synchrotron radiation photoelectron spectroscopy
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Formation of Hubbard-like bands as a fingerprint of strong electron-electron interactions in FeSe
• Topological Phases in the Single-Layer FeSe
• Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs
• Shifts and Splittings of the Hole Bands in the Nematic Phase of FeSe
• The effect of spin fluctuations on the electronic structure in iron based superconductors

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• The key ingredients of the electronic structure of FeSe
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Suppression of electronic correlations by chemical pressure from FeSe to FeS
• Electronic nematic states tuned by isoelectronic substitution in bulk FeSe1-xSx
• Scaling of the superconducting gap with orbital character in FeSe
• Revealing the single electron pocket of FeSe in a single orthorhombic domain
• Electronic band structure of optimal superconductors: from cuprates to ferropnictides and back again
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• Metallic surface states in a correlated d-electron topological Kondo insulator candidate FeSb2
• Self-consistent temperature dependence of quasiparticle bands in monolayer FeSe on SrTiO${}_3$
• $k_z$ selective scattering within Quasiparticle Interference measurements of FeSe
• Raman response in the nematic phase of FeSe
• The fate of quasiparticles at high-temperature
• Orbital transmutation and the electronic spectrum of FeSe in the nematic phase
• FeSe and the missing electron pocket problem
• Interplay between band structure and Hund's correlation to increase T${}_c$ in FeSe
• Anomalous contribution to the nematic electronic states from the structural transition in FeSe revealed by time- and angle-resolved photoemission spectroscopy
• Temperature evolution of the Fermi surface of the FeSe monolayer on SrTiO${}_3$