Charge density waves in graphite; towards the magnetic ultra-quantum limit

Abstract

Graphite is a model system for the study of three-dimensional electrons and holes in the magnetic quantum limit, in which the charges are confined to the lowest Landau levels. We report magneto-transport measurements in pulsed magnetic fields up to 60 T, which resolve the collapse of two density wave states in two, electron and hole, Landau levels at 52.3 and 54.2 T respectively. We report evidence for a commensurate density wave at 47.1 T in the electron Landau level. The theoretical modelling of these results predicts that the ultra-quantum limit is entered above 73.5 T. This state is an insulator, and we discuss its correspondence to the "metallic" state reported earlier. We propose that this (interaction-induced) insulating phase supports surface states that carry no charge or spin within the planes, but does however support charge transport out of plane.

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Cited by in corpus (20)

• Twists and The Electronic Structure of Graphitic Materials
• Unconventional Hall response in the quantum limit of HfTe5
• Dimensional reduction, quantum Hall effect and layer parity in graphite films
• Magnetoresistance and valley degree of freedom in bulk bismuth
• Mixing of surface and bulk electronic states at a graphite-hexagonal boron nitride interface
• Graphite in 90 T: Evidence for Strong-coupling Excitonic Pairing
• Thermodynamic signatures of the field-induced states of graphite
• Critical point for Bose-Einstein condensation of excitons in graphite
• Thickness-dependent phase transition in graphite under high magnetic field
• Nonintrinsic origin of the magnetic-field-induced metal-insulator and electronic phase transitions in graphite
• Ground-state atlas of a three-dimensional semimetal in the quantum limit
• Wide critical fluctuations of the field-induced phase transition in graphite
• Taming the magnetoresistance anomaly in graphite
• Spin-density wave state in simple hexagonal graphite
• Theory of metal-insulator transitions in graphite under high magnetic field
• Observation of Dirac Charge Density Waves in Bi${}_2$Te${}_2$Se
• Spin-Triplet Excitonic Insulator in the Ultra-Quantum Limit of HfTe5
• Theory of phonon instabilities in Weyl semimetals at high magnetic fields
• Magnetoresistance in the Extreme Quantum Limit: Field-Induced Crossover to the Unitarity Limit
• Self-doped graphite nanobelts