1111.1052 (Zhen-Guo Fu et al.)

Probing crossover from analogous weak antilocalization to localization
by an Aharonov-Bohm interferometer on topological insulator surface    [PDF]

Zhen-Guo Fu, Ping Zhang, Shu-Shen Li

We propose a scanning tunneling microscopy Aharonov-Bohm (AB) interferometer on the surface of a topological insulator (TI) to probe the crossover from analogous weak antilocalization (WAL) to weak localization (WL) phenomenon via the AB oscillations in spin-resolved local density of states (LDOS). Based on our analytical and numerical results, we show that with increasing the energy gap of TI surface states, the $\Phi_{0}/2$=$hc/2e$ periodic AB oscillations in spin-resolved LDOS gradually transit into the $\Phi_{0}$ periodic oscillations.

View original: http://arxiv.org/abs/1111.1052