Spatial potential ripples of azimuthal surface modes in topological insulator Bi2Te3 nanowires
- IMM-Instituto de Microelectronica de Madrid (CNM-CSIC), Tres Cantos, Madrid, (Spain)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States)
- Univ. of Hamburg (Germany). Inst. of Nanostructure and Solid State Physics
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Topological insulators (TI) nanowires (NW) are an emerging class of structures, promising both novel quantum effects and potential applications in low-power electronics, thermoelectrics and spintronics. However, investigating the electronic states of TI NWs is complicated, due to their small lateral size, especially at room temperature. Here, we perform scanning probe based nanoscale imaging to resolve the local surface potential landscapes of Bi 2 Te 3 nanowires (NWs) at 300 K. We found equipotential rings around the NWs perimeter that we attribute to azimuthal 1D modes. Along the NW axis, these modes are altered, forming potential ripples in the local density of states, due to intrinsic disturbances. Potential mapping of electrically biased NWs enabled us to accurately determine their conductivity which was found to increase with the decrease of NW diameter, consistent with surface dominated transport. Our results demonstrate that TI NWs can pave the way to both exotic quantum states and novel electronic devices.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC02-05CH1123
- OSTI ID:
- 1256064
- Alternate ID(s):
- OSTI ID: 1379030
- Journal Information:
- Scientific Reports, Vol. 6; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Pulsed current-voltage electrodeposition of stoichiometric Bi 2 Te 3 nanowires and their crystallographic characterization by transmission electron backscatter diffraction
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journal | October 2019 |
Magnetotransport signatures of three-dimensional topological insulator nanostructures
|
journal | June 2018 |
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