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arxiv: cond-mat/0111434 · v2 · submitted 2001-11-22 · ❄️ cond-mat

Surface states and their possible role in the superconductivity of MgB2

V.D.P. Servedio (Institut f. Oberflaechenphysik und Mikrostrukturphysik , TU Dresden , Germany) , S.-L. Drechsler (Institut f. Festkoerper- und Werkstofforschung Dresden , T. Mishonov (Laboratorium voor Vaste-Stoffysica en Magnetisme , Katholieke Universiteit , Leuven , Belgium
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University of Sofia Bulgaria)
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classification ❄️ cond-mat
keywords statessurfacearpesmgb2wellangleanisotropyassigned
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We report layer-Korringa-Kohn-Rostocker calculations for bulk and surface states as well as the corresponding angle resolved photoemission (ARPES) intensities of MgB2. Our theoretical results reproduce very well the recent ARPES data by Uchiyama et al., cond-mat/0111152. At least two surface states are assigned. Consequences of SFS on the anisotropy of the upper critical fields and other properties in the superconducting state of small grains in micropowder samples are briefly discussed.

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