On the phase of magneto-oscillations in graphite

Details On the phase of magneto-oscillations in graphite On the phase of magneto-oscillations in graphite

2009-04-27

arxiv.org/abs/0904.4114v1

PHYSICAL REVIEW B 80, 073403 (2009)

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.80.073403

The problem of Dirac fermions in graphite subject to a perpendicular magnetic field is studied. We show analytically that the weak inter-layer interaction between the graphene sheets leads to anomalies in the Shubnikov-de Haas and de Haas-van Alphen magneto-oscillations governed by the orbits around extremal cross-sections of the graphite Fermi surface. The calculation of the Landau plot performed within a four band continuum model reveals that magneto-oscillations are aperiodic, except of the case of vanishing inter-layer interaction at the H point of the graphite Brillouin zone. Also for all other orbits along the H-K-H edge the magneto-oscillations are only asymptotically periodic in the quasi-classical limit, with the phase corresponding to massive fermions.

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