Thickness-dependent phase transition in graphite under high magnetic field

Abstract

Various electronic phases emerge when applying high magnetic fields in graphite. However, the origin of a semimetal-insulator transition at $B\simeq 30\text{T}$ is still not clear, while an exotic density-wave state is theoretically proposed. In order to identify the electronic state of the insulator phase, we investigate the phase transition in thin-film graphite samples that were fabricated on silicon substrate by a mechanical exfoliation method. The critical magnetic fields of the semimetal-insulator transition in thin-film graphite shift to higher magnetic fields, accompanied by a reduction in temperature dependence. These results can be qualitatively reproduced by a density-wave model by introducing a quantum size effect. Our findings establish the electronic state of the insulator phase as a density-wave state standing along the out-of-plane direction, and help determine the electronic states in other high-magnetic-field phases.

arXiv comment9 pages, 6 figures

References in corpus (10)

• Electric Field Effect in Atomically Thin Carbon Films
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• A consistent interpretation of the low temperature magneto-transport in graphite using the Slonczewski--Weiss--McClure 3D band structure calculations
• Two phase transitions induced by a magnetic field in graphite
• Possible Excitonic Phase of Graphite in the Quantum Limit State
• Possible Fractional Quantum Hall Effect in Graphite
• Charge density waves in graphite; towards the magnetic ultra-quantum limit
• Tunable excitonic insulator in quantum limit graphite
• Electron-hole coexistence in disordered graphene probed by high-field magneto-transport
• Taming the magnetoresistance anomaly in graphite

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• Ground-state atlas of a three-dimensional semimetal in the quantum limit
• Helical Edge States and Quantum Phase Transitions in Tetralayer Graphene
• Taming the magnetoresistance anomaly in graphite
• Record-Breaking Magnetoresistance at the Edge of a Microflake of Natural Graphite
• Self-doped graphite nanobelts