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Phys. Rev. Lett. 100, 257004 (2008) [4 pages]

Anisotropic Multiband Many-Body Interactions in LuNi2B2C

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B. Bergk1, V. Petzold2,*, H. Rosner2, S.-L. Drechsler3, M. Bartkowiak1, O. Ignatchik1, A. D. Bianchi1,†, I. Sheikin4, P. C. Canfield5, and J. Wosnitza1
1Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Dresden-Rossendorf, D-01314 Dresden, Germany
2Max-Planck-Institut für Chemische Physik fester Stoffe, D-01187 Dresden, Germany
3Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), D-01171 Dresden, Germany
4Grenoble High Magnetic Field Laboratory, CNRS, BP 166, F-38042 Grenoble Cedex 09, France
5Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

Received 1 February 2008; published 27 June 2008

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

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.257004
DOI:
10.1103/PhysRevLett.100.257004
PACS:
74.70.Dd, 71.18.+y, 74.25.Jb

*Present address: Department of Phys., Techn. University of Denmark, 2800 Kongens Lyngby, Denmark

†Present address: Départment de physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada

 
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