Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 17: Poster Session: Correlated Electrons 1
TT 17.9: Poster
Montag, 1. April 2019, 15:00–18:30, Poster D
High-field de Haas-van Alphen study of the heavy-fermion compound CeCoIn5 — •J. Hornung1,2, M. Raba3, S. Mishra3, D. Aoki4, I. Sheikin3, and J. Wosnitza1,2 — 1Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Germany — 2Institut für Festkörper- und Materialphysik, TU Dresden, Germany — 3Laboratoire National des Champs Magnétiques Intenses (LNCMI-EMFL), France — 4Institute for Materials Research (IMR), Tohoku University, Japan
We report on de Haas-van Alphen (dHvA) measurements in the heavy-fermion compound CeCoIn5 in magnetic fields up to 36 T and temperatures down to 50 mK. Compared to previous investigations, we were able to observe additional dHvA frequencies and a very diverse field dependence. While some frequencies stay unaffected by magnetic fields, like usually observed and expected, others show a strong field dependence, such as a clear discontinuity at 26.5 T with a change of the measured frequency and/or the effective mass. In addition, the spin splitting of some frequencies, already reasoned from the non-trivial temperature dependence of the dHvA amplitudes in a earlier work, could be resolved directly.