Anisotropic Multiband Many-Body Interactions in LuNi2B2C

Anisotropic Multiband Many-Body Interactions in LuNi2B2C

Bergk, B.; Petzold, V.; Rosner, H.; Drechsler, S.-L.; Bartkowiak, M.; Ignatchik, O.; Bianchi, A. D.; Sheikin, I.; Canfield, P. C.; Wosnitza, J.

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 massenhancement factors, λ, for the different electronic bands and their wave-vector dependences. Our data clearly show the anisotropic multiband character of the superconductivity in LuNi2B2C.

  • Physical Review Letters 100(2008), 257004

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