Unveiling the double-peak structure of quantum oscillations in the specific heat

Zhuo Yang (), Benoît Fauqué, Toshihiro Nomura, Takashi Shitaokoshi, Sunghoon Kim, Debanjan Chowdhury, Zuzana Pribulová, Jozef Kačmarčík, Alexandre Pourret, Georg Knebel, Dai Aoki, Thierry Klein, Duncan K. Maude, Christophe Marcenat and Yoshimitsu Kohama
Additional contact information
Zhuo Yang: The University of Tokyo
Benoît Fauqué: PSL Research University
Toshihiro Nomura: The University of Tokyo
Takashi Shitaokoshi: The University of Tokyo
Sunghoon Kim: Cornell University
Debanjan Chowdhury: Cornell University
Zuzana Pribulová: Slovak Academy of Sciences
Jozef Kačmarčík: Slovak Academy of Sciences
Alexandre Pourret: Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS
Georg Knebel: Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS
Dai Aoki: Tohoku University, Oarai
Thierry Klein: Univ. Grenoble Alpes, CNRS, Institut Néel
Duncan K. Maude: Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA
Christophe Marcenat: Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS
Yoshimitsu Kohama: The University of Tokyo

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Quantum oscillation phenomenon is an essential tool to understand the electronic structure of quantum matter. Here we report a systematic study of quantum oscillations in the electronic specific heat Cel in natural graphite. We show that the crossing of a single spin Landau level and the Fermi energy give rise to a double-peak structure, in striking contrast to the single peak expected from Lifshitz-Kosevich theory. Intriguingly, the double-peak structure is predicted by the kernel term for Cel/T in the free electron theory. The Cel/T represents a spectroscopic tuning fork of width 4.8kBT which can be tuned at will to resonance. Using a coincidence method, the double-peak structure can be used to accurately determine the Landé g-factors of quantum materials. More generally, the tuning fork can be used to reveal any peak in fermionic density of states tuned by magnetic field, such as Lifshitz transition in heavy-fermion compounds.

Date: 2023
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DOI: 10.1038/s41467-023-42730-4

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