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Momentum dependence of the superconducting gap and in-gap states in MgB2 multiband superconductor

TitleMomentum dependence of the superconducting gap and in-gap states in MgB2 multiband superconductor
Publication TypeJournal Article
Year of Publication2015
AuthorsMou, DX, Jiang, R, Taufour, V, Bud'ko, SL, Canfield, PC, Kaminski, A
JournalPhysical Review B
Volume91
Pagination214519
Date Published06
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000357020900006
Keywordsboron, impurities, magnesium diboride, origin
Abstract

rimental uncertainty and in agreement with a pure s-wave pairing symmetry. We also observe in-gap states confined to k(F) of the sigma band that occur at some locations of the sample surface. The energy of this excitation, similar to 3 meV, is somewhat larger than the previously reported gap on pi Fermi sheet and therefore we cannot exclude the possibility of interband scattering as its origin.

DOI10.1103/PhysRevB.91.214519
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Complex States