Electronic structure of the iron-based superconductor LaOFeP

D. H. Lu (), M. Yi, S.-K. Mo, A. S. Erickson, J. Analytis, J.-H. Chu, D. J. Singh, Z. Hussain, T. H. Geballe, I. R. Fisher and Z.-X. Shen ()
Additional contact information
D. H. Lu: Stanford University, Stanford, California 94305, USA
M. Yi: Stanford University, Stanford, California 94305, USA
S.-K. Mo: Stanford University, Stanford, California 94305, USA
A. S. Erickson: Stanford University, Stanford, California 94305-4045, USA
J. Analytis: Stanford University, Stanford, California 94305-4045, USA
J.-H. Chu: Stanford University, Stanford, California 94305-4045, USA
D. J. Singh: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6114, USA
Z. Hussain: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
T. H. Geballe: Stanford University, Stanford, California 94305-4045, USA
I. R. Fisher: Stanford University, Stanford, California 94305-4045, USA
Z.-X. Shen: Stanford University, Stanford, California 94305, USA

Nature, 2008, vol. 455, issue 7209, 81-84

Abstract: Superconductivity: 'itinerant' oxypnictides The discovery of superconductivity in the iron-based layered compounds known as iron oxypnictides has renewed interest in high-temperature superconductivity. Two distinct classes of theories about the nature of the ground state of the oxypnictides have been put forward, characterized by contrasting underlying band structures. Such a controversy is partly due to the lack of conclusive experimental information on the electronic structures. Now Lu et al. report angle-resolved photoemission spectroscopy (ARPES) of an iron oxypnictide, LaOFeP, with a pretty high critical temperature of Tc = 5.9 K. Their results favour an 'itinerant' ground state, over one resembling the 'Mott insulator' state found in copper oxide superconductors.

Date: 2008
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DOI: 10.1038/nature07263

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