Many-body effects in LuNi2B2C

We present de Haas-van Alphen measurements of the nonmagnetic borocarbide superconductor LuNi2B2C. The electronic band structure is extracted from the magnetic quantum oscillations in the normal state. In accordance with previous investigations we find a complex band structure with different open an...

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Bibliographic Details
Published in:Journal of physics. Conference series 2009-03, Vol.150 (5), p.052021
Main Authors: Bergk, B, Petzold, V, Rosner, H, Drechsler, S-L, Bartkowiak, M, Ignatchik, O, Sheikin, I, Canfield, P C, Wosnitza, J
Format: Article
Language:English
Subjects:
Band structure of solids
De Haas-Van Alphen effect
Many body problem
Oscillations
Physics
Temperature dependence
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Summary:We present de Haas-van Alphen measurements of the nonmagnetic borocarbide superconductor LuNi2B2C. The electronic band structure is extracted from the magnetic quantum oscillations in the normal state. In accordance with previous investigations we find a complex band structure with different open and closed Fermi-surface sheets. From the temperature dependence of the oscillations amplitude the effective mass of the single bands can be determined. Due to many-body interactions we observe enhancements of the effective masses compared to the results by full-potential-density-functional calculations. Therefore, we are able to determine the angular dependence of the interaction strength for the different bands separately.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/150/5/052021