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Electrotunable artificial molecules based on van der Waals heterostructures
Quantum confinement has made it possible to detect and manipulate single-electron charge and spin states. The recent focus on two-dimensional (2D) materials has attracted significant interests on possible applications to quantum devices, including detecting and manipulating either single-electron ch...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5650488/ https://www.ncbi.nlm.nih.gov/pubmed/29062893 http://dx.doi.org/10.1126/sciadv.1701699 |
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author | Zhang, Zhuo-Zhi Song, Xiang-Xiang Luo, Gang Deng, Guang-Wei Mosallanejad, Vahid Taniguchi, Takashi Watanabe, Kenji Li, Hai-Ou Cao, Gang Guo, Guang-Can Nori, Franco Guo, Guo-Ping |
author_facet | Zhang, Zhuo-Zhi Song, Xiang-Xiang Luo, Gang Deng, Guang-Wei Mosallanejad, Vahid Taniguchi, Takashi Watanabe, Kenji Li, Hai-Ou Cao, Gang Guo, Guang-Can Nori, Franco Guo, Guo-Ping |
author_sort | Zhang, Zhuo-Zhi |
collection | PubMed |
description | Quantum confinement has made it possible to detect and manipulate single-electron charge and spin states. The recent focus on two-dimensional (2D) materials has attracted significant interests on possible applications to quantum devices, including detecting and manipulating either single-electron charging behavior or spin and valley degrees of freedom. However, the most popular model systems, consisting of tunable double-quantum-dot molecules, are still extremely difficult to realize in these materials. We show that an artificial molecule can be reversibly formed in atomically thin MoS(2) sandwiched in hexagonal boron nitride, with each artificial atom controlled separately by electrostatic gating. The extracted values for coupling energies at different regimes indicate a single-electron transport behavior, with the coupling strength between the quantum dots tuned monotonically. Moreover, in the low-density regime, we observe a decrease of the conductance with magnetic field, suggesting the observation of Coulomb blockade weak anti-localization. Our experiments demonstrate for the first time the realization of an artificial quantum-dot molecule in a gated MoS(2) van der Waals heterostructure, which could be used to investigate spin-valley physics. The compatibility with large-scale production, gate controllability, electron-hole bipolarity, and new quantum degrees of freedom in the family of 2D materials opens new possibilities for quantum electronics and its applications. |
format | Online Article Text |
id | pubmed-5650488 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-56504882017-10-23 Electrotunable artificial molecules based on van der Waals heterostructures Zhang, Zhuo-Zhi Song, Xiang-Xiang Luo, Gang Deng, Guang-Wei Mosallanejad, Vahid Taniguchi, Takashi Watanabe, Kenji Li, Hai-Ou Cao, Gang Guo, Guang-Can Nori, Franco Guo, Guo-Ping Sci Adv Research Articles Quantum confinement has made it possible to detect and manipulate single-electron charge and spin states. The recent focus on two-dimensional (2D) materials has attracted significant interests on possible applications to quantum devices, including detecting and manipulating either single-electron charging behavior or spin and valley degrees of freedom. However, the most popular model systems, consisting of tunable double-quantum-dot molecules, are still extremely difficult to realize in these materials. We show that an artificial molecule can be reversibly formed in atomically thin MoS(2) sandwiched in hexagonal boron nitride, with each artificial atom controlled separately by electrostatic gating. The extracted values for coupling energies at different regimes indicate a single-electron transport behavior, with the coupling strength between the quantum dots tuned monotonically. Moreover, in the low-density regime, we observe a decrease of the conductance with magnetic field, suggesting the observation of Coulomb blockade weak anti-localization. Our experiments demonstrate for the first time the realization of an artificial quantum-dot molecule in a gated MoS(2) van der Waals heterostructure, which could be used to investigate spin-valley physics. The compatibility with large-scale production, gate controllability, electron-hole bipolarity, and new quantum degrees of freedom in the family of 2D materials opens new possibilities for quantum electronics and its applications. American Association for the Advancement of Science 2017-10-20 /pmc/articles/PMC5650488/ /pubmed/29062893 http://dx.doi.org/10.1126/sciadv.1701699 Text en Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Zhang, Zhuo-Zhi Song, Xiang-Xiang Luo, Gang Deng, Guang-Wei Mosallanejad, Vahid Taniguchi, Takashi Watanabe, Kenji Li, Hai-Ou Cao, Gang Guo, Guang-Can Nori, Franco Guo, Guo-Ping Electrotunable artificial molecules based on van der Waals heterostructures |
title | Electrotunable artificial molecules based on van der Waals heterostructures |
title_full | Electrotunable artificial molecules based on van der Waals heterostructures |
title_fullStr | Electrotunable artificial molecules based on van der Waals heterostructures |
title_full_unstemmed | Electrotunable artificial molecules based on van der Waals heterostructures |
title_short | Electrotunable artificial molecules based on van der Waals heterostructures |
title_sort | electrotunable artificial molecules based on van der waals heterostructures |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5650488/ https://www.ncbi.nlm.nih.gov/pubmed/29062893 http://dx.doi.org/10.1126/sciadv.1701699 |
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