Nernst response of the Landau tubes in graphite across the quantum limit

Abstract

We report on a study of the Nernst effect in graphite extended up to 45 T. The Nernst response sharply peaks each time a Landau tube is squeezed inside the thermally fuzzy Fermi surface and presents a temperature-independent fixed point whenever the tube flattens to a single ring. Beyond the quantum limit, the onset of the field-induced phase transition leads to a drastic drop in the Nernst response signaling the sudden vanishing of Landau tubes. The magnitude of this drop suggests the destruction of multiple Landau tubes possibly as a result of simultaneous nesting of the electron and hole pockets.

arXiv comment4 pages, 4 figures

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• Two phase transitions induced by a magnetic field in graphite
• Landau spectrum and twin boundaries of bismuth in the extreme quantum limit
• 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
• Wide critical fluctuations of the field-induced phase transition in graphite
• Quantized thermoelectric Hall plateau in the quantum limit of graphite as a nodal line semimetal