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

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

2009-02-14

arxiv.org/abs/0902.2503v1

Physica C 469 (2009) 452-458

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1016/j.physc.2009.03.044

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.

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