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Atomic correlations in itinerant ferromagnets: quasi-particle bands of nickel

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arxiv cond-mat/0204142 v1 pith:G5DHXUUQ submitted 2002-04-05 cond-mat.str-el

Atomic correlations in itinerant ferromagnets: quasi-particle bands of nickel

J. Buenemann , F. Gebhard , T. Ohm , R. Umstaetter , S. Weiser , W. Weber , R. Claessen , D. Ehm
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A. Harasawa A. Kakizaki A. Kimura G. Nicolay S. Shin V.N. Strocov
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keywords nickeltheoryatomiccorrelationsitinerantalongangle-resolvedband
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We measure the band structure of nickel along various high-symmetry lines of the bulk Brillouin zone with angle-resolved photoelectron spectroscopy. The Gutzwiller theory for a nine-band Hubbard model whose tight-binding parameters are obtained from non-magnetic density-functional theory resolves most of the long-standing discrepancies between experiment and theory on nickel. Thereby we support the view of itinerant ferromagnetism as induced by atomic correlations.

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