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Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires

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...

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Autores principales: Muñoz Rojo, Miguel, Zhang, Yingjie, Manzano, Cristina V., Alvaro, Raquel, Gooth, Johannes, Salmeron, Miquel, Martin-Gonzalez, Marisol
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4707462/
https://www.ncbi.nlm.nih.gov/pubmed/26751282
http://dx.doi.org/10.1038/srep19014
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author Muñoz Rojo, Miguel
Zhang, Yingjie
Manzano, Cristina V.
Alvaro, Raquel
Gooth, Johannes
Salmeron, Miquel
Martin-Gonzalez, Marisol
author_facet Muñoz Rojo, Miguel
Zhang, Yingjie
Manzano, Cristina V.
Alvaro, Raquel
Gooth, Johannes
Salmeron, Miquel
Martin-Gonzalez, Marisol
author_sort Muñoz Rojo, Miguel
collection PubMed
description 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.
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spelling pubmed-47074622016-01-20 Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires Muñoz Rojo, Miguel Zhang, Yingjie Manzano, Cristina V. Alvaro, Raquel Gooth, Johannes Salmeron, Miquel Martin-Gonzalez, Marisol Sci Rep Article 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. Nature Publishing Group 2016-01-11 /pmc/articles/PMC4707462/ /pubmed/26751282 http://dx.doi.org/10.1038/srep19014 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Muñoz Rojo, Miguel
Zhang, Yingjie
Manzano, Cristina V.
Alvaro, Raquel
Gooth, Johannes
Salmeron, Miquel
Martin-Gonzalez, Marisol
Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires
title Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires
title_full Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires
title_fullStr Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires
title_full_unstemmed Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires
title_short Spatial potential ripples of azimuthal surface modes in topological insulator Bi(2)Te(3) nanowires
title_sort spatial potential ripples of azimuthal surface modes in topological insulator bi(2)te(3) nanowires
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4707462/
https://www.ncbi.nlm.nih.gov/pubmed/26751282
http://dx.doi.org/10.1038/srep19014
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