ARPES studies of the electronic structure of LaOFe(P,As)

Abstract

We report a comparison study of LaOFeP and LaOFeAs, two parent compounds of recently discovered iron-pnictide superconductors, using angle-resolved photoemission spectroscopy. Both systems exhibit some common features that are very different from well-studied cuprates. In addition, important differences have also been observed between these two ferrooxypnictides. For LaOFeP, quantitative agreement can be found between our photoemission data and the LDA band structure calculations, suggesting that a weak coupling approach based on an itinerant ground state may be more appropriate for understanding this new superconducting compound. In contrast, the agreement between LDA calculations and experiments in LaOFeAs is relatively poor, as highlighted by the unexpected Fermi surface topology around (pi,pi). Further investigations are required for a comprehensive understanding of the electronic structure of LaOFeAs and related compounds.

16 pages, 4 figures, for the special issue of Physica C on superconducting pnictides

References in corpus (18)

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Cited by in corpus (17)

• Dynamical Mean-Field Theory within an Augmented Plane-Wave Framework: Assessing Electronic Correlations in the Iron Pnictide LaFeAsO
• Superconductivity and spin-density-waves in multi-band metals
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Spin excitations in the excitonic spin-density-wave state of the iron pnictides
• Quantum Monte Carlo Study of Pairing Symmetry and Correlation in Iron-based Superconductors
• Doping dependence of spin fluctuations and electron correlations in iron pnictides
• Surface and bulk electronic structures of LaOFeAs studied by angle resolved photoemission spectroscopy
• Interaction-induced singular Fermi surface in a high-temperature oxypnictide superconductor
• Linear-Temperature Dependence of Static Magnetic Susceptibility in LaFeAsO from Dynamical Mean-Field Theory
• Evolution of the Phase Diagram of LaFeP${}_{1-x}$As${}_x$O${}_{1-y}$F${}_y$ ($y$ = 0 -- 0.1)
• Microscopic origin of the linear temperature increase of the magnetic susceptibility of BaFe${}_2$As${}_2$
• Structural and superconducting properties in LaFeAs1-xSbxO1-yFy
• Proposal to determine the Fermi-surface topology of a doped iron-based superconductor using bulk-sensitive Fourier-transform Compton scattering
• The effect of spin fluctuations on the electronic structure in iron based superconductors
• Strong surface termination dependence of the electronic structure of polar superconductor LaFeAsO revealed by nano-ARPES
• Josephson-frustrated superconductors in a magnetic field
• Fluctuating magnetism of Co- and Cu-doped NaFeAs