Anisotropic multiband many-body interactions in LuNi2B2C

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2008-06-27
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Bergk, B.
Petzold, V.
Rosner, H.
Drechsler, S. -L.
Bartkowiak, M.
Ignatchik, O.
Bianchi, A. D.
Sheikin, I.
Wosnitza, J.
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American Physical Society
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Canfield, Paul
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Physics and Astronomy
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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.
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This article is published as Bergk, B., V. Petzold, H. Rosner, S-L. Drechsler, M. Bartkowiak, O. Ignatchik, A. D. Bianchi, I. Sheikin, P. C. Canfield, and J. Wosnitza. "Anisotropic Multiband Many-Body Interactions in LuNi 2 B 2 C." Physical review letters 100, no. 25 (2008): 257004. DOI: 10.1103/PhysRevLett.100.257004. Copyright 2008 American Physical Society. Posted with permission.
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