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

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 C_el 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 C_el/T in the free electron theory. The C_el/T represents a spectroscopic tuning fork of width 4.8k_BT 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 quantu

SUBMITTER: Yang Z 

PROVIDER: S-EPMC10632398 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature