2019/01/20 by Archana Lakhani, Devendra Kumar
Chemistry · Materials Science · Physics and Astronomy · #Chemistry #Condensed matter physics #Conductance #Conduction electron #Dephasing #Electron #Electron transport chain #Graphene research and applications #Magnetic field #Magnetoresistance #Materials science #Physics #Quantum and electron transport phenomena #Quantum mechanics #Thermal conduction #Topological Materials and Phenomena #Weak localization #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.5089536
6 pages, 5 figures
arxiv created 2019/01/20 · openalex publication_date 2019/05/06 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The bulk of topological insulators is relatively unexplored, due to the excess contribution of conduction from native defects. Here, we investigate the bulk conduction in a Bi2Te3 crystal having a reduced number of defect states. Our results reveal the presence of three transport regimes which are dominated by thermal activation across the bulk band gap, defect state charge conduction, and quantum coherent transport. The low temperature conductance and magnetoconductance reveal the presence of multichannel two-dimensional quantum coherent transport in the bulk. The number of channels is of the order of quintuple layers, signifying each quintuple layer as a single transport channel. These transport channels exhibit a two-dimensional electron-electron interaction effect causing electron dephasing, whereas the conduction from defect states exhibits a three-dimensional electron-electron interaction effect.