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Chiral current regulation and detection of Berry phase in triangular triple quantum dots |
| Yue Qi(齐月)1, Yi-Ming Liu(刘一铭)1, Yuan-Dong Wang(王援东)2, Jian-Hua Wei(魏建华)1,†, and Zhen-Gang Zhu(朱振刚)2,‡ |
1. Department of Physics, Renmin University, Beijing 100876, China;
2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Based on the hierarchical equations of motion (HEOM) calculation, we theoretically investigate the corresponding control of a triangular triple-quantum-dots (TTQD) ring which is connected to two reservoirs. We initially demonstrate by adding bias voltage and further adjusting the coupling strength between quantum dots, the chiral current induced by bias will go through a transformation of clockwise to counterclockwise direction and an unprecedented effective Hall angle will be triggered. The transformation is very rapid, with a corresponding characteristic time of 80-200 ps. In addition, by adding a magnetic flux to compensate for the chiral current in the original system, we elucidate the relationship between the applied magnetic flux and the Berry phase, which can realize direct measurement of the chiral current and reveal the magnetoelectric coupling relationship.
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Received: 07 April 2023
Revised: 06 May 2023
Accepted manuscript online: 09 May 2023
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PACS:
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73.21.La
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(Quantum dots)
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11.30.Rd
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(Chiral symmetries)
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64.70.Tg
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(Quantum phase transitions)
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| Fund: Project supported by the National Natural Science Foundation of China(Grant Nos.11774418, 11374363,11674317, 11974348, 11834014,and 21373191), the Strategic Priority Research Program of CAS (Grant Nos.XDB28000000 and XDB33000000), and the Training Program of Major Research Plan of NSFC (Grant No.92165105). |
Corresponding Authors:
Jian-Hua Wei, Zhen-Gang Zhu
E-mail: wjh@ruc.edu.cn;zgzhu@ucas.ac.cn
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Cite this article:
Yue Qi(齐月), Yi-Ming Liu(刘一铭), Yuan-Dong Wang(王援东), Jian-Hua Wei(魏建华), and Zhen-Gang Zhu(朱振刚) Chiral current regulation and detection of Berry phase in triangular triple quantum dots 2023 Chin. Phys. B 32 087304
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