Abstract
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.
| Original language | English |
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| Article number | 186401 |
| Journal | Physical Review Letters |
| Volume | 94 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 13 May 2005 |
| Externally published | Yes |