Fermi Surface and Band Renormalization in (Sr,K)Fe${}_2$As${}_2$ Superconductor from Angle-Resolved Photoemission Spectroscopy

Abstract

High resolution angle-resolved photoemission measurements have been carried out on (Sr,K)Fe${}_2$As${}_2$ superconductor (Tc=21 K). Three hole-like Fermi surface sheets are clearly resolved for the first time around the Gamma point. The overall electronic structure shows significant difference from the band structure calculations. Qualitative agreement between the measured and calculated band structure is realized by assuming a chemical potential shift of -0.2 eV. The obvious band renormalization suggests the importance of electron correlation in understanding the electronic structure of the Fe-based compounds.

4 pages, 4 figures

References in corpus (19)

• 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
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Correlated electronic structure of LaOFeAs
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Electronic structure of the iron-based superconductor LaOFeP
• Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaOFeAs
• Proximity of antiferromagnetism and superconductivity in LaO${}_{1-x}$F${}_x$FeAs: effective Hamiltonian from ab initio studies
• Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved Photoemission System with a Super-High Energy Resolution Better Than 1 meV
• The Fermi surface of Ba(1-x)K(x)Fe2As2 and its evolution with doping
• Electronic Structure of Prototype AFe_2As_2 and ReOFeAs High-Temperature Superconductors: a Comparison
• Transport properties and superconductivity in $B{a}_{1-x}{M}_{x}F{e}_{2}A{s}_2$ (M=La and K) with double FeAs layers
• High Energy Dispersions in Bi2Sr2CaCu2O8 High Temperature Superconductor from Laser-Based Angle-Resolved Photoemission

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• Electronic structure studies of BaFe2As2 by angle-resolved photoemission spectroscopy
• Tight binding model for iron pnictides
• Impurity-induced in-gap state and Tc in sign-reversing s-wave superconductors: analysis of iron oxypnictide superconductors
• Band renormalization and Fermi surface reconstruction in iron-based superconductors
• Experimental Detection of Sign-Reversal Pairing in Iron-Based Superconductors
• Optical and Raman spectroscopy studies on Fe-based superconductors
• The superconductor KxSr(1-x)Fe2As2: Normal state and superconducting properties
• The magnetic moment enigma in Fe-based high temperature superconductors
• Electronic Structure of CeFeAsO1-xFx (x=0, 0.11/x=0.12) compounds
• Unusual Electronic Structure and Observation of Dispersion Kink in CeFeAsO Parent Compound of FeAs-Based Superconductors
• Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors
• Strong correlations and the search for high-Tc superconductivity in chromium pnictides and chalcogenides
• Inelastic Neutron Scattering Studies of the Spin and Lattice Dynamics in Iron Arsenide Compounds
• Constrain on possible pairing symmetry in a two-orbital model of FeAs-based superconductors
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• Orbital-lattice coupling and orbital ordering instability in iron pnictides