Field-induced hybridization of moiré excitons in MoSe$_2$/WS$_2$ heterobilayers
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911777967570944 |
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| author | Polovnikov, Borislav Scherzer, Johannes Misra, Subhradeep Huang, Xin Mohl, Christian Li, Zhijie Göser, Jonas Förste, Jonathan Bilgin, Ismail Watanabe, Kenji Taniguchi, Takashi Högele, Alexander Baimuratov, Anvar S. |
| author_facet | Polovnikov, Borislav Scherzer, Johannes Misra, Subhradeep Huang, Xin Mohl, Christian Li, Zhijie Göser, Jonas Förste, Jonathan Bilgin, Ismail Watanabe, Kenji Taniguchi, Takashi Högele, Alexander Baimuratov, Anvar S. |
| contents | We study experimentally and theoretically the hybridization among intralayer and interlayer moiré excitons in a MoSe$_2$/WS$_2$ heterostructure with antiparallel alignment. Using a dual-gate device and cryogenic white light reflectance and narrow-band laser modulation spectroscopy, we subject the moiré excitons in the MoSe$_2$/WS$_2$ heterostack to a perpendicular electric field, monitor the field-induced dispersion and hybridization of intralayer and interlayer moiré exciton states, and induce a cross-over from type I to type II band alignment. Moreover, we employ perpendicular magnetic fields to map out the dependence of the corresponding exciton Landé $g$-factors on the electric field. Finally, we develop an effective theoretical model combining resonant and non-resonant contributions to moiré potentials to explain the observed phenomenology, and highlight the relevance of interlayer coupling for structures with close energetic band alignment as in MoSe$_2$/WS$_2$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2304_14037 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Field-induced hybridization of moiré excitons in MoSe$_2$/WS$_2$ heterobilayers Polovnikov, Borislav Scherzer, Johannes Misra, Subhradeep Huang, Xin Mohl, Christian Li, Zhijie Göser, Jonas Förste, Jonathan Bilgin, Ismail Watanabe, Kenji Taniguchi, Takashi Högele, Alexander Baimuratov, Anvar S. Mesoscale and Nanoscale Physics Materials Science We study experimentally and theoretically the hybridization among intralayer and interlayer moiré excitons in a MoSe$_2$/WS$_2$ heterostructure with antiparallel alignment. Using a dual-gate device and cryogenic white light reflectance and narrow-band laser modulation spectroscopy, we subject the moiré excitons in the MoSe$_2$/WS$_2$ heterostack to a perpendicular electric field, monitor the field-induced dispersion and hybridization of intralayer and interlayer moiré exciton states, and induce a cross-over from type I to type II band alignment. Moreover, we employ perpendicular magnetic fields to map out the dependence of the corresponding exciton Landé $g$-factors on the electric field. Finally, we develop an effective theoretical model combining resonant and non-resonant contributions to moiré potentials to explain the observed phenomenology, and highlight the relevance of interlayer coupling for structures with close energetic band alignment as in MoSe$_2$/WS$_2$. |
| title | Field-induced hybridization of moiré excitons in MoSe$_2$/WS$_2$ heterobilayers |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2304.14037 |