paper

Oscillatory crossover from two dimensional to three dimensional topological insulators

arXiv:0908.3654 · doi:10.1103/PhysRevB.81.041307

Abstract

We investigate the crossover regime from three dimensional topological insulators and to two dimensional topological insulators with quantum spin Hall effect when the layer thickness is reduced. Using both analytical models and first-principles calculations, we find that the crossover occurs in an oscillatory fashion as a function of the layer thickness, alternating between topologically trivial and non-trivial two dimensional behavior.

5 pages, 3 figures; 3 added references, an added note

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