Surface-driven electronic structure in LaFeAsO studied by angle resolved photoemission spectroscopy

Abstract

We measured the electronic structure of an iron arsenic parent compound LaFeAsO using angle resolved photoemission spectroscopy (ARPES). By comparing with a full-potential Linear Augmented PlaneWave calculation we show that the extra large Gamma hole pocket measured via ARPES comes from electronic structure at the sample surface. Based on this we discuss the strong polarization dependence of the band structure and a temperature-dependent hole-like band around the M point. The two phenomena give additional evidences for the existence of the surface-driven electronic structure.

6 pages, 6 figures

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• Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2 - parent compound for an iron arsenic high temperature superconductor
• Scanning tunneling spectroscopy of SmFeAsO0.85: Possible evidence for d-wave order parameter symmetry
• ARPES studies of the electronic structure of LaOFe(P,As)

Cited by in corpus (31)

• Superconductivity in Iron Compounds
• Iron based superconductors: magnetism, superconductivity and electronic structure
• Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors
• Fe-based superconductors: an angle-resolved photoemission spectroscopy perspective
• Electronic reconstruction through the structural and magnetic transitions in detwinned NaFeAs
• Existence, character and origin of surface-related bands in the high temperature iron pnictide superconductor BaFe_{2-x}Co_{x}As_{2}
• Universal behavior of the upper critical field in iron based superconductors
• Interaction-induced singular Fermi surface in a high-temperature oxypnictide superconductor
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Fermi surface topology and low-lying electronic structure of a new iron-based superconductor Ca10(Pt3As8)(Fe2As2)5
• Evolution of the Phase Diagram of LaFeP${}_{1-x}$As${}_x$O${}_{1-y}$F${}_y$ ($y$ = 0 -- 0.1)
• Quasiparticle interference of C2-symmetric surface states in LaOFeAs parent compound
• High-temperature superconductivity from fine-tuning of Fermi-surface singularities in iron oxypnictides
• Non-local correlations in Iron Pnictides and Chalcogenides
• Impurity-induced quasiparticle interference in the parent compounds of iron-pnictide superconductors
• Two-dimensional magnetic interactions in LaFeAsO
• Presence of magnetic excitations in SmFeAsO
• Single Vortex Pinning and Penetration Depth in Superconducting NdFeAsO${}_{1-x}$F${}_x$
• Anomalies of upper critical field in the spinel superconductor LiTi${}_2$O${}_{4-\delta }$
• Angle-resolved photoemission spectroscopy observation of anomalous electronic states in EuFe${}_2$As${}_{2-x}$P${}_x$
• Multiple-pseudogap phases in hydrogen-doped LaFeAsO system
• Disentangling the surface and bulk electronic structures of LaOFeAs
• Intrinsic charge dynamics in high-Tc AFeAs(O,F) superconductors
• Two-Fluid Description for Iron-Based Superconductors
• Revealing the intrinsic superconducting gap anisotropy in surface-neutralized BaFe${}_2$(As${}_{0.7}$P${}_{0.3}$)${}_2$
• Strong surface termination dependence of the electronic structure of polar superconductor LaFeAsO revealed by nano-ARPES
• Temperature dependent As K-edge EXAFS studies of LaFe1-xCoxAsO (x = 0.0 and 0.11) single crystals
• Superconducting gap and pseudogap in the surface states of the iron-based superconductor PrFeAsO${}_{1-y}$ studied by angle-resolved photoemission spectroscopy
• In-plane electronic anisotropy revealed by interlayer resistivity measurements on the iron-based superconductor parent compound CaFeAsF
• Observation of the bands with $d_{xy}$ orbital character near the Fermi level in NdFeAs${}_{1-x}$P${}_x$O${}_{0.9}$F${}_{0.1}$ using angle-resolved photoemission spectroscopy