Anomalous Aharonov-Bohm Oscillations in Bi$_{2}$Te$_{3}$ Nanotubes with disorders

Topological insulator Bi$_{2}$Te$_{3}$ nanotubes have been synthesized and their magnetotransport properties have been studied on single nanotubes. The conductance of the nanotube can be characterized by Mott's variable range hopping model in a wide temperature range, indicating the system is in a strong disorder regime. Magnetoresistance oscillations with h/e period from the nanotube outer surface were observed, suggesting the presence of surface states due to anomalous Aharonov-Bohm effect. The results show for the first time that the topological surface states are robust against strong disorders.