We investigate the quantum transport properties of surface electrons on a topological insulator Bi2Te3 nanowire in a magnetotransport study. Although the nanowires are synthesized by using a relatively coarse method of electrochemical deposition, clear Aharonov-Bohm oscillations of phases 0 and pi are observed, owing to the highly coherent surface electron channel. The oscillation amplitude exhibits exponential temperature dependence, suggesting that the phase coherence length L_phi is inversely proportional to the temperature, as in quasi-ballistic systems. In addition, a weak antilocalization analysis on the surface channel by using a one-dimensional localization theory, enabled by successful extraction of the surface contribution from the magnetoconductance data, is provided in support of the temperature dependence of L_phi.
@article{arxiv.1511.00089,
title = {Quantum electrical transport properties of topological insulator Bi2Te3 nanowires},
author = {Hong-Seok Kim and Ho Sun Shin and Joon Sung Lee and Chi Won Ahn and Jae Yong Song and Yong-Joo Doh},
journal= {arXiv preprint arXiv:1511.00089},
year = {2015}
}