| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Manipulation of internal blockage in triangular triple quantum dot |
| Yue Qi(齐月) and Jian-Hua Wei(魏建华)† |
| Department of Physics, Renmin University, Beijing 100876, China |
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Abstract We utilize the calculation of hierarchical equations of motion to demonstrate that the spin-dependent properties between adjacent quantum dots (QDs) can be changed by breaking the internal symmetry configuration, corresponding to the inversion of dominant chiral states. In the linear triple quantum dots (LTQDs) connected to two electron reservoirs, we can observe that the blockage appears at the triangle triple quantum dots (TTQDs) by gradually increasing the coupling strength between next-nearest double QDs. When the initial coupling between LTQDs has altered, the internal chiral circulation also undergoes the corresponding transform, thus achieving qualitative regulation and detection of the blocking region. We also investigate the response of the chiral circulation to the dot-lead coupling strength, indicating the overall robust chiral circulation of the TTQDs frustration.
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Received: 16 October 2023
Revised: 04 February 2024
Accepted manuscript online: 27 February 2024
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PACS:
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73.21.La
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(Quantum dots)
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75.10.Pq
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(Spin chain models)
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64.70.Tg
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(Quantum phase transitions)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 12274454, 11774418, 11374363, 11674317, 11974348, 11834014, and 21373191), the Strategic Priority Research Program of CAS (Grant Nos. XDB28000000 and XDB33000000), the National Natural Science Foundation of China (Grant No. 11974348), the Training Program of Major Research Plan of NSFC (Grant No. 92165105), and the Outstanding Innovative Talents Cultivation Funded Programs 2023 of Renmin University of China. |
Corresponding Authors:
Jian-Hua Wei
E-mail: wjh@ruc.edu.cn
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Cite this article:
Yue Qi(齐月) and Jian-Hua Wei(魏建华) Manipulation of internal blockage in triangular triple quantum dot 2024 Chin. Phys. B 33 057301
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