Electronic structure of the iron-based superconductor LaOFeP

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dc.creatorLu, D. H.
dc.creatorYi, M.
dc.creatorMo, S. -K.
dc.creatorErickson, A. S.
dc.creatorAnalytis, J.
dc.creatorChu, J. -H.
dc.creatorSingh, D. J.
dc.creatorHussain, Z.
dc.creatorGeballe, T. H.
dc.creatorFisher, I. R.
dc.creatorShen, Z. -X.
dc.date2008-07-13
dc.date.accessioned2026-07-07T12:38:30Z
dc.date.available2026-07-07T12:38:30Z
dc.descriptionThe recent discovery of superconductivity in the so-called iron-oxypnictide family of compounds has generated intense interest. The layered crystal structure with transition metal ions in planar square lattice form and the discovery of spin-density-wave order near 130 K seem to hint at a strong similarity with the copper oxide superconductors. A burning current issue is the nature of the ground state of the parent compounds. Two distinct classes of theories have been put forward depending on the underlying band structures: local moment antiferromagnetic ground state for strong coupling approach and itinerant ground state for weak coupling approach. The local moment magnetism approach stresses on-site correlations and proximity to a Mott insulating state and thus the resemblance to cuprates; while the latter approach emphasizes the itinerant electron physics and the interplay between the competing ferromagnetic and antiferromagnetic fluctuations. Such a controversy is partly due to the lack of conclusive experimental information on the electronic structures. Here we report the first angle-resolved photoemission spectroscopy (ARPES) investigation of LaOFeP (Tc = 5.9 K), the first reported iron-based superconductor. Our results favor the itinerant ground state, albeit with band renormalization. In addition, our data reveal important differences between these and copper based superconductors.
dc.description17 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0807.2009
dc.identifierhttp://arxiv.org/abs/0807.2009
dc.identifierNature 455, 81-84 (4 September 2008)
dc.identifierdoi:10.1038/nature07263
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218780
dc.subjectSuperconductivity
dc.titleElectronic structure of the iron-based superconductor LaOFeP
dc.typetext

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