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Evidences of Mott physics in iron pnictides from x-ray spectroscopy

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arxiv 1607.07417 v1 pith:CZGFRDOY submitted 2016-07-25 cond-mat.supr-con cond-mat.str-el

S. Lafuerza , H. Gretarsson , F. Hardy , T. Wolf , C. Meingast , G. Giovannetti , M. Capone , A. S. Sefat
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Y.-J. Kim P. Glatzel L. de' Medici
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classification cond-mat.supr-concond-mat.str-el
keywords localmottx-rayabsorptionbafe2as2bandsconductiondetermine
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X-ray emission and absorption spectroscopies are jointly used as fast probes to determine the evolution as a function of doping of the fluctuating local magnetic moments in K- and Cr- hole-doped BaFe2As2. An increase in the local moment with hole-doping is found, supporting the theoretical scenario in which a Mott insulating state that would be realized for half-filled conduction bands has an influence throughout the phase diagram of these iron-pnictides.

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