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 moir\'e 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 moir\'e potentials acting on holes and excitons, resulting in their different spatial distribution within the superlattice.
@article{arxiv.2407.17025,
title = {Emergent Trion Resonance Driven by Lattice Reconstruction in a Moir\'e Superlattice},
author = {Zhida Liu and Haonan Wang and Xiaohui Liu and Yue Ni and Hongtao Yan and Frank Y. Gao and Saba Arash and Hyunsue Kim and Dong Seob Kim and Xiangcheng Liu and Xiaoxiao Yu and Yongxin Zeng and Jiamin Quan and Di Huang and Kenji Watanabe and Takashi Taniguchi and Edoardo Baldini and Keji Lai and Allan H. MacDonald and Chih-Kang Shih and Jamie Warner and Li Yang and Xiaoqin Li},
journal= {arXiv preprint arXiv:2407.17025},
year = {2026}
}