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arXiv · 1509.02657

Quasi-two-dimensional Fermi surfaces of the heavy-fermion superconductor Ce$_2$PdIn$_8$

K. Götze·J. Klotz·D. Gnida·H. Harima·D. Aoki·A. Demuer·S. Elgazzar·J. Wosnitza·D. Kaczorowski·I. Sheikin
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Abstract

We report low-temperature de Haas-van Alphen (dHvA) effect measurements in magnetic fields up to 35 T of the heavy-fermion superconductor Ce$_2$PdIn$_8$. The comparison of the experimental results with band-structure calculations implies that the 4$f$ electrons are itinerant rather than localized. The cyclotron masses estimated at high field are only moderately enhanced, 8 and 14 $m_0$, but are substantially larger than the corresponding band masses. The observed angular dependence of the dHvA frequencies suggests quasi-two-dimensional Fermi surfaces in agreement with band-structure calculations. However, the deviation from ideal two dimensionality is larger than in CeCoIn$_5$, with which Ce$_2$PdIn$_8$ bears a lot of similarities. This subtle distinction accounts for the different superconducting critical temperatures of the two compounds.

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K. Götze, J. Klotz, D. Gnida, H. Harima, D. Aoki, A. Demuer, S. Elgazzar, J. Wosnitza, D. Kaczorowski, I. Sheikin. 2015-09-09. Quasi-two-dimensional Fermi surfaces of the heavy-fermion superconductor Ce$_2$PdIn$_8$. https://doi.org/10.1103/physrevb.92.115141

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