Kozlovsky, Raphael and Graf, Ansgar and Kochan, Denis and Richter, Klaus and Gorini, Cosimo (2020) Magnetoconductance, Quantum Hall Effect, and Coulomb Blockade in Topological Insulator Nanocones. PHYSICAL REVIEW LETTERS, 124 (12): 126804. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
Magnetotransport through cylindrical topological insulator (TI) nanowires is governed by the interplay between quantum confinement and geometric (Aharonov-Bohm and Berry) phases. Here, we argue that the much broader class of TI nanowires with varying radius-for which a homogeneous coaxial magnetic field induces a varying Aharonov-Bohm flux that gives rise to a nontrivial masslike potential along the wire-is accessible by studying its simplest member, a TI nanocone. Such nanocones allow us to observe intriguing mesoscopic transport phenomena: While the conductance in a perpendicular magnetic field is quantized due to higher-order topological hinge states, it shows resonant transmission through Dirac Landau levels in a coaxial magnetic field. Furthermore, it may act as a quantum magnetic bottle, confining surface Dirac electrons and leading to a largely interaction-dominated regime of Coulomb blockade type. We show numerically that the above-mentioned effects occur for experimentally accessible values of system size and magnetic field, suggesting that TI nanocone junctions may serve as building blocks for Dirac electron optics setups.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONDUCTANCE; STATES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Mar 2021 08:15 |
| Last Modified: | 29 Mar 2021 08:15 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44891 |
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