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Quantum oscillations of electrical resistivity in an insulator

“…A number of intriguing physical origins have been proposed, including exciton-based magnetic breakdown [5,6], Majorana type chargeneutral Fermi surfaces [7], and a failed superconducting ground state [8]. Recent theories suggest that an emergent neutral Fermi sea can exist in a mixed-valence gapped system, which may exhibit both dHvA and SdH oscillations under external magnetic field [9,10].…”