Anomalous de Haas-van Alphen oscillations in CeCoIn5

We present de Haas-van Alphen oscillation measurements showing a strong spin dependence of the quasiparticle mass enhancement in the heavy fermion superconductor CeCoIn5 at high magnetic fields. There is evidence that the Fermi-liquid temperature dependence of the oscillations, embodied in the Lifsh...

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Bibliographic Details
Published in:Physical review letters 2005-05, Vol.94 (18), p.186401-186401
Main Authors: McCollam, A, Julian, S R, Rourke, P M C, Aoki, D, Flouquet, J
Format: Article
Language:English
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Summary:We present de Haas-van Alphen oscillation measurements showing a strong spin dependence of the quasiparticle mass enhancement in the heavy fermion superconductor CeCoIn5 at high magnetic fields. There is evidence that the Fermi-liquid temperature dependence of the oscillations, embodied in the Lifshitz-Kosevich equation, is breaking down on the most strongly renormalized Fermi surface sheets.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.94.186401