Experimental evidence on the Altshuler-Aronov-Spivak interference of the topological surface states in the exfoliated Bi 2Te 3 nanoflakes

Abstract

Here, we demonstrate the Altshuler-Aronov-Spivak (AAS) interference of the topological surface states on the exfoliated Bi 2Te 3 microflakes by a flux period of h/2e in their magnetoresistance oscillations and its weak field character. Both the oscillations with the period of h/e and h/2e are observed. The h/2e-period AAS oscillation gradually dominates with increasing the sample widths and the temperatures. This reveals the transition of the Dirac Fermions' transport to the diffusive regime. © 2012 American Institute of Physics.