One-dimensional edge transport on the surface of cylindrical BixTe3-ySey nanowires in transverse magnetic fields
Baessler S, Hamdou B, Sergelius P, Michel AK, Zierold R, Reith H, Gooth J, Nielsch K (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 107
Article Number: 181602
Journal Issue: 18
DOI: 10.1063/1.4935244
Abstract
The geometry of topological insulators (TIs) has a major impact on the magnetoelectric band structure of their surface states. Here, we investigate the surface states of cylindrical TI bismuth telluride selenide nanowires with three different diameters, by parallel and transverse magnetoresistance (MR) measurements. In parallel configuration, we observe Aharonov-Bohm oscillations as well as weak antilocalization, indicating two-dimensional TI surface states. In transverse magnetic fields, we observed MR oscillations that are non-linear against the reciprocal of the magnetic field and thus cannot be explained by two- or three-dimensional states. Instead, our transport data analysis reveals that these MR oscillations are the consequence of one-dimensional edge channels at the nanowire surface that form due to the projection of the external magnetic field on the cylindrically curved surface plane in high magnetic fields. Our observation provides an exotic class of surface states that might be used for electronic and spintronic devices.
Involved external institutions
Germany (DE)How to cite
APA:
Baessler, S., Hamdou, B., Sergelius, P., Michel, A.-K., Zierold, R., Reith, H.,... Nielsch, K. (2015). One-dimensional edge transport on the surface of cylindrical BixTe3-ySey nanowires in transverse magnetic fields. Applied Physics Letters, 107(18). https://doi.org/10.1063/1.4935244
MLA:
Baessler, Svenja, et al. "One-dimensional edge transport on the surface of cylindrical BixTe3-ySey nanowires in transverse magnetic fields." Applied Physics Letters 107.18 (2015).
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