Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy

Abstract

We have performed soft x-ray and ultrahigh-resolution laser-excited photoemission measurements on tetragonal FeSe, which was recently identified as a superconductor. Energy dependent study of valence band is compared to band structure calculations and yields a reasonable assignment of partial densities of states. However, the sharp peak near the Fermi level slightly deviates from the calculated energy position, giving rise to the necessity of self-energy correction. We have also performed ultrahigh-resolution laser photoemission experiment on FeSe and observed the suppression of intensity around the Fermi level upon cooling.

6 pages, 3 figures

References in corpus (14)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• The superconductivity at 18 K in LiFeAs system
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Crystal structure of the new FeSe1-x superconductor
• Momentum dependence of the superconducting gap in NdFeAsO1-xFx single crystals measured by angle resolved photoemission spectroscopy
• Superconducting Gap and Pseudogap in Iron-Based Layered Superconductor La(O${}_{1-x}$F${}_x$)FeAs
• Evidence for Unconventional Superconductivity in Arsenic-Free Iron-Based Superconductor FeSe : A ^77Se-NMR Study
• Electronic Structure and Electron Correlation in LaFeAsO_{1-x}F_x and LaFePO_{1-x}F_x
• Unusual Pseudogap-like Features Observed in Iron Oxypnictide Superconductors

Cited by in corpus (20)

• Comparison of Ab initio Low-Energy Models for LaFePO, LaFeAsO, BaFe2As2, LiFeAs, FeSe and FeTe: Electron Correlation and Covalency
• Theoretical evidence for strong correlations and incoherent metallic state in FeSe
• Electronic Structure Calculation by First Principles for Strongly Correlated Electron Systems
• The Stoichiometry of FeSe
• A perspective on pnictide superconductors
• Correlation induced spin freezing transition in FeSe: a dynamical mean field study
• Electron correlation in FeSe superconductor studied by bulk-sensitive photoemission spectroscopy
• Correlation-driven topological Fermi surface transition in FeSe
• Strength of correlations in pnictides and its assessment by theoretical calculations and spectroscopy experiments
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• Density Functional Study of the Over-Doped Iron Chalcogenide: TlFe${}_2$Se${}_2$ with ThCr${}_2$Si${}_2$ structure
• Hubbard interactions in iron-based pnictides and chalcogenides: Slater parametrization, screening channels and frequency dependence
• X-ray absorption spectroscopy (XAS) investigation of the electronic structure of superconducting FeSex single crystals
• Superconductivity in PbO-type Fe chalcogenides
• Investigation of correlation effects in FeSe and FeTe by LDA + U method
• Orbital-Selective Superconductivity and the Effect of Lattice Distortion in Iron-Based Superconductors
• Ab initio prediction of pressure-induced structural phase transition of superconducting FeSe
• Photoemission studies of the near Fermi level spectral weight shifts in FeSe1-xTex superconductor
• Impact of atomic defects in the electronic states of FeSe${}_{1-x}$S${}_x$ superconducting crystals
• Superconductivity and Antiferromagnetism In Fe(Te1-xSx)y System