Emergent Trion Resonance Driven by Lattice Reconstruction in a Moiré Superlattice
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911714682863616 |
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| author | Liu, Zhida Wang, Haonan Liu, Xiaohui Ni, Yue Yan, Hongtao Gao, Frank Y. Arash, Saba Kim, Hyunsue Kim, Dong Seob Liu, Xiangcheng Yu, Xiaoxiao Zeng, Yongxin Quan, Jiamin Huang, Di Watanabe, Kenji Taniguchi, Takashi Baldini, Edoardo Lai, Keji MacDonald, Allan H. Shih, Chih-Kang Warner, Jamie Yang, Li Li, Xiaoqin |
| author_facet | Liu, Zhida Wang, Haonan Liu, Xiaohui Ni, Yue Yan, Hongtao Gao, Frank Y. Arash, Saba Kim, Hyunsue Kim, Dong Seob Liu, Xiangcheng Yu, Xiaoxiao Zeng, Yongxin Quan, Jiamin Huang, Di Watanabe, Kenji Taniguchi, Takashi Baldini, Edoardo Lai, Keji MacDonald, Allan H. Shih, Chih-Kang Warner, Jamie Yang, Li Li, Xiaoqin |
| contents | We investigate how many-electron excited states emerge in twisted MoSe2 homobilayers when the lattice reconstructions evolve. Notably, we identify a new trion resonance that arises in the transition regime of lattice reconstruction, where gradual changes in atomic alignment between the layers occur. Magnetic field-dependent measurements, supported by first-principles calculations, indicate that the exciton forms at the K valley while the doped hole resides in the Gamma valley. First-principles calculations further indicate that two nearly degenerate exciton resonances can arise, localized at different sites within the moiré supercell. We propose that the new trion resonance is a "charge-transfer" trion, in which the electron-hole pair is spatially separated from the doped hole. The emergence of these complex excited states stems from the distinct moiré potentials acting on holes and excitons, resulting in their different spatial distribution within the superlattice. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_17025 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergent Trion Resonance Driven by Lattice Reconstruction in a Moiré Superlattice Liu, Zhida Wang, Haonan Liu, Xiaohui Ni, Yue Yan, Hongtao Gao, Frank Y. Arash, Saba Kim, Hyunsue Kim, Dong Seob Liu, Xiangcheng Yu, Xiaoxiao Zeng, Yongxin Quan, Jiamin Huang, Di Watanabe, Kenji Taniguchi, Takashi Baldini, Edoardo Lai, Keji MacDonald, Allan H. Shih, Chih-Kang Warner, Jamie Yang, Li Li, Xiaoqin Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons We investigate how many-electron excited states emerge in twisted MoSe2 homobilayers when the lattice reconstructions evolve. Notably, we identify a new trion resonance that arises in the transition regime of lattice reconstruction, where gradual changes in atomic alignment between the layers occur. Magnetic field-dependent measurements, supported by first-principles calculations, indicate that the exciton forms at the K valley while the doped hole resides in the Gamma valley. First-principles calculations further indicate that two nearly degenerate exciton resonances can arise, localized at different sites within the moiré supercell. We propose that the new trion resonance is a "charge-transfer" trion, in which the electron-hole pair is spatially separated from the doped hole. The emergence of these complex excited states stems from the distinct moiré potentials acting on holes and excitons, resulting in their different spatial distribution within the superlattice. |
| title | Emergent Trion Resonance Driven by Lattice Reconstruction in a Moiré Superlattice |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.17025 |