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| Auteurs principaux: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| Accès en ligne: | https://arxiv.org/abs/2605.05571 |
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| _version_ | 1866913097310011392 |
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| author | Lu, Zheyu Nie, Jiahui Wang, Tianle Dutta, Rwik Qi, Ruishi Xie, Jingxu Uzundal, Can Xiao, Jianghan Wang, Ziyu Feng, Yibo Watanabe, Kenji Taniguchi, Takashi Chelikowsky, James R. Raja, Archana Louie, Steven G. Naik, Mit H. Zaletel, Michael P. Wang, Feng |
| author_facet | Lu, Zheyu Nie, Jiahui Wang, Tianle Dutta, Rwik Qi, Ruishi Xie, Jingxu Uzundal, Can Xiao, Jianghan Wang, Ziyu Feng, Yibo Watanabe, Kenji Taniguchi, Takashi Chelikowsky, James R. Raja, Archana Louie, Steven G. Naik, Mit H. Zaletel, Michael P. Wang, Feng |
| contents | Moiré superlattices formed by transition metal dichalcogenide (TMD) heterobilayers provide a versatile platform for studying strongly correlated electronic, excitonic, and topological phenomena in solids. In particular, angle-aligned MoSe$_2$/WS$_2$ heterobilayers, which have a Type-I band alignment at zero vertical electric field, host rich correlated spin and charge physics. Here, combining large-scale first-principles calculations and optical reflection spectroscopy, we report a thorough study of the emergent moiré excitonic states and interlayer charge-transfer states in angle-aligned electron-doped MoSe$_2$/WS$_2$ moiré superlattices. The moiré excitonic states serve as sensitive optical probes to the localization profile of doped electrons. We observe a series of interlayer charge-transfer transitions from n/n$_0$ = 1 to 4 (where n$_0$ denotes the moiré density) when the vertical electric field switches the heterostructure band alignment from Type-I to Type-II. By tuning the vertical electric field, we can precisely control the interlayer electron localization, realizing a Fermi-Hubbard model with a tunable charge-transfer band on an effective honeycomb lattice. Furthermore, Monte Carlo simulation of the doping dependence of the electric-field susceptibility predicts that multiple correlated charge-ordered states appear at both integer and fractional fillings. Our results provide a holistic understanding of the emergent optical excitations and the correlated charge-transfer states in electron-doped MoSe$_2$/WS$_2$ moiré superlattices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_05571 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Tunable Interlayer Charge-transfer States in MoSe$_2$/WS$_2$ Moiré Superlattices Lu, Zheyu Nie, Jiahui Wang, Tianle Dutta, Rwik Qi, Ruishi Xie, Jingxu Uzundal, Can Xiao, Jianghan Wang, Ziyu Feng, Yibo Watanabe, Kenji Taniguchi, Takashi Chelikowsky, James R. Raja, Archana Louie, Steven G. Naik, Mit H. Zaletel, Michael P. Wang, Feng Mesoscale and Nanoscale Physics Strongly Correlated Electrons Moiré superlattices formed by transition metal dichalcogenide (TMD) heterobilayers provide a versatile platform for studying strongly correlated electronic, excitonic, and topological phenomena in solids. In particular, angle-aligned MoSe$_2$/WS$_2$ heterobilayers, which have a Type-I band alignment at zero vertical electric field, host rich correlated spin and charge physics. Here, combining large-scale first-principles calculations and optical reflection spectroscopy, we report a thorough study of the emergent moiré excitonic states and interlayer charge-transfer states in angle-aligned electron-doped MoSe$_2$/WS$_2$ moiré superlattices. The moiré excitonic states serve as sensitive optical probes to the localization profile of doped electrons. We observe a series of interlayer charge-transfer transitions from n/n$_0$ = 1 to 4 (where n$_0$ denotes the moiré density) when the vertical electric field switches the heterostructure band alignment from Type-I to Type-II. By tuning the vertical electric field, we can precisely control the interlayer electron localization, realizing a Fermi-Hubbard model with a tunable charge-transfer band on an effective honeycomb lattice. Furthermore, Monte Carlo simulation of the doping dependence of the electric-field susceptibility predicts that multiple correlated charge-ordered states appear at both integer and fractional fillings. Our results provide a holistic understanding of the emergent optical excitations and the correlated charge-transfer states in electron-doped MoSe$_2$/WS$_2$ moiré superlattices. |
| title | Tunable Interlayer Charge-transfer States in MoSe$_2$/WS$_2$ Moiré Superlattices |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.05571 |