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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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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container_issue 5
container_start_page 052021
container_title Journal of physics. Conference series
container_volume 150
creator Bergk, B
Petzold, V
Rosner, H
Drechsler, S-L
Bartkowiak, M
Ignatchik, O
Sheikin, I
Canfield, P C
Wosnitza, J
description 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.
doi_str_mv 10.1088/1742-6596/150/5/052021
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subjects Band structure of solids
De Haas-Van Alphen effect
Many body problem
Oscillations
Physics
Temperature dependence
title Many-body effects in LuNi2B2C
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