Moiré exciton polaron engineering via twisted hBN
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| _version_ | 1866910599242317824 |
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| author | Cho, Minhyun Datta, Biswajit Han, Kwanghee Chand, Saroj B. Adak, Pratap Chandra Yu, Sichao Li, Fengping Watanabe, Kenji Taniguchi, Takashi Hone, James Jung, Jeil Grosso, Gabriele Kim, Young Duck Menon, Vinod M. |
| author_facet | Cho, Minhyun Datta, Biswajit Han, Kwanghee Chand, Saroj B. Adak, Pratap Chandra Yu, Sichao Li, Fengping Watanabe, Kenji Taniguchi, Takashi Hone, James Jung, Jeil Grosso, Gabriele Kim, Young Duck Menon, Vinod M. |
| contents | Twisted hexagonal boron nitride (thBN) exhibits emergent ferroelectricity due to the formation of moiré superlattices with alternating AB and BA domains. These domains possess electric dipoles, leading to a periodic electrostatic potential that can be imprinted onto other 2D materials placed in its proximity. Here we demonstrate the remote imprinting of moiré patterns from twisted hexagonal boron nitride (thBN) onto monolayer MoSe2 and investigate the resulting changes in the exciton properties. We confirm the imprinting of moiré patterns on monolayer MoSe2 via proximity using Kelvin probe force microscopy (KPFM) and hyperspectral photoluminescence (PL) mapping. By developing a technique to create large ferroelectric domain sizes ranging from 1 μm to 8.7 μm, we achieve unprecedented potential modulation of 387 +- 52 meV. We observe the formation of exciton polarons due to charge redistribution caused by the antiferroelectric moiré domains and investigate the optical property changes induced by the moiré pattern in monolayer MoSe2 by varying the moiré pattern size down to 110 nm. Our findings highlight the potential of twisted hBN as a platform for controlling the optical and electronic properties of 2D materials for optoelectronic and valleytronic applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_06999 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Moiré exciton polaron engineering via twisted hBN Cho, Minhyun Datta, Biswajit Han, Kwanghee Chand, Saroj B. Adak, Pratap Chandra Yu, Sichao Li, Fengping Watanabe, Kenji Taniguchi, Takashi Hone, James Jung, Jeil Grosso, Gabriele Kim, Young Duck Menon, Vinod M. Materials Science Mesoscale and Nanoscale Physics Optics Twisted hexagonal boron nitride (thBN) exhibits emergent ferroelectricity due to the formation of moiré superlattices with alternating AB and BA domains. These domains possess electric dipoles, leading to a periodic electrostatic potential that can be imprinted onto other 2D materials placed in its proximity. Here we demonstrate the remote imprinting of moiré patterns from twisted hexagonal boron nitride (thBN) onto monolayer MoSe2 and investigate the resulting changes in the exciton properties. We confirm the imprinting of moiré patterns on monolayer MoSe2 via proximity using Kelvin probe force microscopy (KPFM) and hyperspectral photoluminescence (PL) mapping. By developing a technique to create large ferroelectric domain sizes ranging from 1 μm to 8.7 μm, we achieve unprecedented potential modulation of 387 +- 52 meV. We observe the formation of exciton polarons due to charge redistribution caused by the antiferroelectric moiré domains and investigate the optical property changes induced by the moiré pattern in monolayer MoSe2 by varying the moiré pattern size down to 110 nm. Our findings highlight the potential of twisted hBN as a platform for controlling the optical and electronic properties of 2D materials for optoelectronic and valleytronic applications. |
| title | Moiré exciton polaron engineering via twisted hBN |
| topic | Materials Science Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2409.06999 |