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

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

2011-05-30

arxiv.org/abs/1105.5928v2

Phys. Rev. Lett. 106, 246405 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.106.246405

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.

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