Magnetic quantum oscillations of the topological insulator surface states

Details Magnetic quantum oscillations of the topological insulator surface states Magnetic quantum oscillations of the topological insulator surface states

2010-06-04

arxiv.org/abs/1006.0886v2

Phys. Rev. B 82, 085429 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5.5 PRB pages, 5 figures

Scientific paper

10.1103/PhysRevB.82.085429

We study quantum oscillations of the magnetization in Bi$_{2}$Se$_{3}$(111) surface system in the presence of a perpendicular magnetic field. The combined spin-chiral Dirac cone and Landau quantization produce profound effects on the magnetization properties that are fundamentally different from those in the conventional semiconductor two-dimensional electron gas. In particular, we show that the oscillating center in the magnetization chooses to pick up positive or negative values depending on whether the zero-mode Landau level is occupied or empty. An intuitive analysis of these new features is given and the subsequent effects on the magnetic susceptibility and Hall conductance are also discussed.

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