Aharonov-Bohm Interference and Phase-Coherent Surface-State Transport in Topological Insulator Rings.

ABSTRACT: We present low-temperature magnetotransport measurements on selectively grown Sb₂Te₃-based topological insulator ring structures. These devices display clear Aharonov-Bohm oscillations in the conductance originating from phase-coherent transport around the ring. The temperature dependence of the oscillation amplitude indicates that the Aharonov-Bohm oscillations originate from ballistic transport along the ring arms. We attribute these oscillations to the topological surface states. Further insight into the phase coherence is gained by comparing with similar Aharonov-Bohm-type oscillations in topological insulator nanoribbons exposed to an axial magnetic field. Here, quasi-ballistic phase-coherent transport is confirmed for closed-loop topological surface states in th

SUBMITTER: Behner G 

PROVIDER: S-EPMC10375586 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature