| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Exciton Bose–Einstein Condensation in Transition Metal Dichalcogenide Monolayer under In-Plane Magnetic Fields |
| Dengfeng Wang1,2†, Yingda Chen1,2†, Zhi-Chuan Niu1,2, Wen-Kai Lou1,2*, and Kai Chang1,2,3* |
1SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2College of Materials Science and Opto-electronic Technology, Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3School of Physics, Zhejiang University, Hangzhou 310027, China
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| Cite this article: |
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Dengfeng Wang, Yingda Chen, Zhi-Chuan Niu et al 2024 Chin. Phys. Lett. 41 087101 |
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Abstract Based on the Gross–Pitaevskii equation, we theoretically investigate exciton Bose–Einstein condensation (BEC) in transition metal dichalcogenide monolayers (TMDC-MLs) under in-plane magnetic fields. We observe that the in-plane magnetic fields exert a strong influence on the exciton BEC wave functions in TMDC-MLs because of the mixing of the bright and dark exciton states via Zeeman effect. This leads to the brightening of the dark exciton BEC states. The competition between the dipole–dipole interactions caused by the long-range Coulomb interaction and the Zeeman effect induced by the in-plane magnetic fields can effectively regulate dark exciton BEC states. Our findings emphasize the utility of TMD-MLs as platforms for investigating collective phenomenon involving excited states.
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Received: 20 April 2024
Editors' Suggestion
Published: 16 August 2024
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| PACS: |
71.35.-y
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(Excitons and related phenomena)
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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68.65.-k
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(Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties)
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71.35.Lk
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(Collective effects (Bose effects, phase space filling, and excitonic phase transitions))
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