Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2
Abstract Stacking monolayers of two‐dimensional (2D) transition metal dichalcogenides with different twist angles can provide a way to tune their quantum optical and electronic characteristics. This study demonstrates that the bandgap energy and interlayer coupling strength of twisted bilayer (tBL)...
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Wiley
2025-06-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202500411 |
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| author | Krishna P. Dhakal Trang Thu Tran Taegeon Lee Wooseon Choi Sean F. Peterson Juan M. Marmolejo‐Tejada Jaeuk Bahng Daekwon Lee Vu Khac Dat Ji‐Hee Kim Seong Chu Lim Martín A. Mosquera Young‐Min Kim Heesuk Rho Jeongyong Kim |
| author_facet | Krishna P. Dhakal Trang Thu Tran Taegeon Lee Wooseon Choi Sean F. Peterson Juan M. Marmolejo‐Tejada Jaeuk Bahng Daekwon Lee Vu Khac Dat Ji‐Hee Kim Seong Chu Lim Martín A. Mosquera Young‐Min Kim Heesuk Rho Jeongyong Kim |
| author_sort | Krishna P. Dhakal |
| collection | DOAJ |
| description | Abstract Stacking monolayers of two‐dimensional (2D) transition metal dichalcogenides with different twist angles can provide a way to tune their quantum optical and electronic characteristics. This study demonstrates that the bandgap energy and interlayer coupling strength of twisted bilayer (tBL) ReS2 can be continuously modulated by the twist angle. By controlling the twist angle between 0° and 10°, the exciton energy of tBL ReS2 is tuned over a range of 40 meV, which is comparable to the difference between the exciton energies of intrinsic monolayer and bilayer ReS2. Such a wide modulation range for the interlayer coupling strength of tBL ReS2, which significantly affects the band structure, is also shown by the systematic shift in the low‐and high‐frequency Raman modes and results of a strain study using scanning transmission electron microscopy imaging. Density functional theory calculations on moiré superlattice tBL ReS2 structures confirm a consistent increase in the bandgap with the twist angle. The strong modulation of interlayer coupling by the twist angle in tBL ReS2 is attributed to the low symmetry of the 1T' structure and in‐plane anisotropy of the ReS2 lattice. These findings demonstrate the enhanced tunability of twist‐controlled electronic structure in anisotropic 2D materials, offering new pathways for designing reconfigurable quantum materials. |
| format | Article |
| id | doaj-art-e3d9902b4f1d4ba985e27bb4c8478ca2 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-e3d9902b4f1d4ba985e27bb4c8478ca22025-08-20T03:31:26ZengWileyAdvanced Science2198-38442025-06-011223n/an/a10.1002/advs.202500411Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2Krishna P. Dhakal0Trang Thu Tran1Taegeon Lee2Wooseon Choi3Sean F. Peterson4Juan M. Marmolejo‐Tejada5Jaeuk Bahng6Daekwon Lee7Vu Khac Dat8Ji‐Hee Kim9Seong Chu Lim10Martín A. Mosquera11Young‐Min Kim12Heesuk Rho13Jeongyong Kim14Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Physics, Research Institute for Materials and Energy Sciences Jeonbuk National University Jeonju 54896 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Physics Montana State University Bozeman MT 59717 United StatesDepartment of Chemistry and Biochemistry Montana State University Bozeman MT 59717 United StatesDepartment of Smart Fabrication Technology Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Physics, Research Institute for Materials and Energy Sciences Jeonbuk National University Jeonju 54896 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Physics Pusan National University Busan 46241 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Chemistry and Biochemistry Montana State University Bozeman MT 59717 United StatesDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Physics, Research Institute for Materials and Energy Sciences Jeonbuk National University Jeonju 54896 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaAbstract Stacking monolayers of two‐dimensional (2D) transition metal dichalcogenides with different twist angles can provide a way to tune their quantum optical and electronic characteristics. This study demonstrates that the bandgap energy and interlayer coupling strength of twisted bilayer (tBL) ReS2 can be continuously modulated by the twist angle. By controlling the twist angle between 0° and 10°, the exciton energy of tBL ReS2 is tuned over a range of 40 meV, which is comparable to the difference between the exciton energies of intrinsic monolayer and bilayer ReS2. Such a wide modulation range for the interlayer coupling strength of tBL ReS2, which significantly affects the band structure, is also shown by the systematic shift in the low‐and high‐frequency Raman modes and results of a strain study using scanning transmission electron microscopy imaging. Density functional theory calculations on moiré superlattice tBL ReS2 structures confirm a consistent increase in the bandgap with the twist angle. The strong modulation of interlayer coupling by the twist angle in tBL ReS2 is attributed to the low symmetry of the 1T' structure and in‐plane anisotropy of the ReS2 lattice. These findings demonstrate the enhanced tunability of twist‐controlled electronic structure in anisotropic 2D materials, offering new pathways for designing reconfigurable quantum materials.https://doi.org/10.1002/advs.202500411excitonsinterlayer couplingReS2, twistronics |
| spellingShingle | Krishna P. Dhakal Trang Thu Tran Taegeon Lee Wooseon Choi Sean F. Peterson Juan M. Marmolejo‐Tejada Jaeuk Bahng Daekwon Lee Vu Khac Dat Ji‐Hee Kim Seong Chu Lim Martín A. Mosquera Young‐Min Kim Heesuk Rho Jeongyong Kim Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2 Advanced Science excitons interlayer coupling ReS2, twistronics |
| title | Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2 |
| title_full | Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2 |
| title_fullStr | Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2 |
| title_full_unstemmed | Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2 |
| title_short | Giant Modulation of Interlayer Coupling in Twisted Bilayer ReS2 |
| title_sort | giant modulation of interlayer coupling in twisted bilayer res2 |
| topic | excitons interlayer coupling ReS2, twistronics |
| url | https://doi.org/10.1002/advs.202500411 |
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