Anisotropic multiband many-body interactions in LuNi2B2C

TitleAnisotropic multiband many-body interactions in LuNi2B2C
Publication TypeJournal Article
Year of Publication2008
AuthorsBergk B, Petzold V, Rosner H, Drechsler SL, Bartkowiak M, Ignatchik O, Bianchi AD, Sheikin I, Canfield PC, Wosnitza J
Journal TitlePhysical Review Letters
Volume100
Pages257004
Date PublishedJun
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000257230500058
Keywordselectronic-structure, fermi-surface, heat, OSCILLATIONS, SINGLE-CRYSTAL YNI2B2C, spectroscopy, SUPERCONDUCTING ENERGY-GAP, TRANSITION-METAL BOROCARBIDES, VAN-ALPHEN
Abstract

We present a comprehensive de Haas-van Alphen study on the nonmagnetic borocarbide superconductor LuNi2B2C. The analysis of the angular-dependent effective masses for different bands in combination with full-potential density functional calculations allowed us to determine the mass-enhancement factors, lambda, for the different electronic bands and their wave-vector dependences. Our data clearly show the anisotropic multiband character of the superconductivity in LuNi2B2C.

DOI10.1103/PhysRevLett.100.257004
Alternate JournalPhys. Rev. Lett.