1209.5985 (Binghai Yan et al.)

Topological surface states of Bi2Se3 with the coexistence of Se
vacancies    [PDF]

Binghai Yan, Delin Zhang, Claudia Feler

Although topological surface states are known to be robust against non-magnetic surface perturbations, their band dispersions and spatial distributions are still sensitive to the surface defects. Take Bi2Se3 as an example, we demonstrated that Se vacancies modifies the surface band structures considerably. Topological surface states may sink down into the second quintuple layer as a self-protection, when large numbers of Se vacancies exist on the surface. We simulated STM images to distinguish the surfaces with Se- and Bi-terminations.

View original: http://arxiv.org/abs/1209.5985