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

Abstract

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.

4.2 APL pages, 2 figures

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