Robust Fermi-Surface Morphology of CeRhIn 5 across the Putative Field-Induced Quantum Critical Point

Ilya Sheikin (1) , J. Hornung (2) , M. Raba (3) , J. Klotz (2) , T. Förster (2) , H. Harima (4) , D. Aoki (5) , J. Wosnitza (2) , A. Mccollam (6) , Sanu Mishra (1)

1 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
2 HZDR - Helmholtz-Zentrum Dresden-Rossendorf
3 EFS - Etablissement français du sang - Auvergne-Rhône-Alpes
4 Kobe University
5 IMR - Institute of Material Research, Tohoku University
6 Radboud University [Nijmegen]

We report a comprehensive de Haas--van Alphen (dHvA) study of the heavy-fermion material CeRhIn$_5$ in magnetic fields up to 70~T. Several dHvA frequencies gradually emerge at high fields as a result of magnetic breakdown. Among them is the thermodynamically important $\beta_1$ branch, which has not been observed so far. Comparison of our angule-dependent dHvA spectra with those of the non-$4f$ compound LaRhIn$_5$ and with band-structure calculations evidences that the Ce $4f$ electrons in CeRhIn$_5$ remain localized over the whole field range. This rules out any significant Fermi-surface reconstruction, either at the suggested nematic phase transition at $B^{*}\approx$ 30~T or at the putative quantum critical point at $B_c \simeq$ 50~T. Our results rather demonstrate the robustness of the Fermi surface and the localized nature of the 4$f$ electrons inside and outside of the antiferromagnetic phase.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Ilya Sheikin, J. Hornung, M. Raba, J. Klotz, T. Förster, et al.. Robust Fermi-Surface Morphology of CeRhIn 5 across the Putative Field-Induced Quantum Critical Point. Physical Review Letters, 2021, 126 (1), ⟨10.1103/PhysRevLett.126.016403⟩. ⟨hal-03113393⟩