Cyclotron motion in the vicinity of a Lifshitz transition in graphite

Details Cyclotron motion in the vicinity of a Lifshitz transition in graphite Cyclotron motion in the vicinity of a Lifshitz transition in graphite

2011-09-23

arxiv.org/abs/1109.5014v2

Phys. Rev. Lett. 108, 017602 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures plus Supplementary material, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.108.017602

Graphite, a model (semi)metal with trigonally warped bands, is investigated with magneto-absorption experiment and viewed as an electronic system in the vicinity of the Lifshitz transition. A characteristic pattern of up to twenty cyclotron resonance harmonics has been observed. This large number of resonances, their relative strengths and characteristic shapes trace the universal properties of the electronic states near a separatrix in the momentum space. Quantum-mechanical perturbative methods with respect to the trigonal warping term hardly describe the data which are, on the other hand, fairly well reproduced within a quasi-classical approach and conventional band structure model. Trigonal symmetry is preserved in graphite in contrast to a similar system, bilayer graphene.

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