Abstract
We investigate the crossover regime from three-dimensional topological insulators Bi2 Te3 and Bi2 Se3 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 nontrivial two-dimensional behavior.
| Original language | English (US) |
|---|---|
| Article number | 041307 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 81 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jan 19 2010 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics