Spatial potential ripples of azimuthal surface modes in topological insulator Bi2Te3 nanowires

Muñoz Rojo, Miguel; Zhang, Yingjie; Manzano, Cristina V.; Alvaro, Raquel; Gooth, Johannes; Salmeron, Miquel; Martin-Gonzalez, Marisol

doi:10.1038/srep19014

Spatial potential ripples of azimuthal surface modes in topological insulator Bi₂Te₃ nanowires

Journal Article · Mon Jan 11 00:00:00 EST 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep19014· OSTI ID:1256064

Muñoz Rojo, Miguel ^[1]; Zhang, Yingjie ^[2]; Manzano, Cristina V. ^[1]; Alvaro, Raquel ^[1]; Gooth, Johannes ^[3]; Salmeron, Miquel ^[4]; Martin-Gonzalez, Marisol ^[1]

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 Bi₂Te₃ 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. Finally, our results demonstrate that TI NWs can pave the way to both exotic quantum states and novel electronic devices.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1256064

Alternate ID(s):: OSTI ID: 1379030

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Vol. 6; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Pulsed current-voltage electrodeposition of stoichiometric Bi ₂ Te ₃ nanowires and their crystallographic characterization by transmission electron backscatter diffraction Manzano, Cristina V.; Polyakov, Mikhail N.; Maiz, Jon Science and Technology of Advanced Materials, Vol. 20, Issue 1 https://doi.org/10.1080/14686996.2019.1671778	journal	October 2019
Magnetotransport signatures of three-dimensional topological insulator nanostructures Moors, Kristof; Schüffelgen, Peter; Rosenbach, Daniel Physical Review B, Vol. 97, Issue 24 https://doi.org/10.1103/physrevb.97.245429	journal	June 2018

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