Twist angle-dependent transport properties of twisted bilayer graphene
Abstract Twisted bilayer graphene (tBLG) with small twist angles has attracted significant attention because of its unique electronic properties arising from the formation of a moiré superlattice. In this study, we systematically characterized the twist-angle-dependent electronic and transport prope...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-07-01
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| Series: | NPG Asia Materials |
| Online Access: | https://doi.org/10.1038/s41427-024-00556-6 |
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| author | Jin Hong Kim Seoung-Hun Kang Duhee Yoon Hakseong Kim Jin-Soo Kim Mohd Musaib Haidari Dong Jin Jang Jin-Yong Ko Young-Woo Son Bae Ho Park Jin Sik Choi |
| author_facet | Jin Hong Kim Seoung-Hun Kang Duhee Yoon Hakseong Kim Jin-Soo Kim Mohd Musaib Haidari Dong Jin Jang Jin-Yong Ko Young-Woo Son Bae Ho Park Jin Sik Choi |
| author_sort | Jin Hong Kim |
| collection | DOAJ |
| description | Abstract Twisted bilayer graphene (tBLG) with small twist angles has attracted significant attention because of its unique electronic properties arising from the formation of a moiré superlattice. In this study, we systematically characterized the twist-angle-dependent electronic and transport properties of tBLG grown via chemical vapor deposition. This characterization included parameters such as the charge-neutral point voltage, carrier concentration, resistance, and mobility, covering a wide range of twist angles from 0° to 30°. We experimentally demonstrated that these parameters exhibited twist-angle-dependent moiré period trends, with high twist angles exceeding 9°, revealing more practically useful features, including improved mobilities compared to those of single-layer graphene. In addition, we demonstrated that the doping states and work functions were weakly dependent on the twist angles, as confirmed by additional first-principles calculations. This study provides valuable insights into the transport properties of tBLG and its potential for practical applications in the emerging field of twistronics. |
| format | Article |
| id | doaj-art-5bf7f3c1fc934c44a4aa32a49c885073 |
| institution | Kabale University |
| issn | 1884-4057 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | NPG Asia Materials |
| spelling | doaj-art-5bf7f3c1fc934c44a4aa32a49c8850732025-01-19T12:28:33ZengNature PortfolioNPG Asia Materials1884-40572024-07-011611910.1038/s41427-024-00556-6Twist angle-dependent transport properties of twisted bilayer grapheneJin Hong Kim0Seoung-Hun Kang1Duhee Yoon2Hakseong Kim3Jin-Soo Kim4Mohd Musaib Haidari5Dong Jin Jang6Jin-Yong Ko7Young-Woo Son8Bae Ho Park9Jin Sik Choi10Department of Physics, Konkuk UniversityKorea Institute for Advanced StudyCenter for Integrated Nanostructure Physics, Institute for Basic ScienceKorea Research Institute of Standard and ScienceDepartment of Physics, Korea UniversityDepartment of Physics, Konkuk UniversityDepartment of Physics, Konkuk UniversityDepartment of Physics, Konkuk UniversityKorea Institute for Advanced StudyDepartment of Physics, Konkuk UniversityDepartment of Physics, Konkuk UniversityAbstract Twisted bilayer graphene (tBLG) with small twist angles has attracted significant attention because of its unique electronic properties arising from the formation of a moiré superlattice. In this study, we systematically characterized the twist-angle-dependent electronic and transport properties of tBLG grown via chemical vapor deposition. This characterization included parameters such as the charge-neutral point voltage, carrier concentration, resistance, and mobility, covering a wide range of twist angles from 0° to 30°. We experimentally demonstrated that these parameters exhibited twist-angle-dependent moiré period trends, with high twist angles exceeding 9°, revealing more practically useful features, including improved mobilities compared to those of single-layer graphene. In addition, we demonstrated that the doping states and work functions were weakly dependent on the twist angles, as confirmed by additional first-principles calculations. This study provides valuable insights into the transport properties of tBLG and its potential for practical applications in the emerging field of twistronics.https://doi.org/10.1038/s41427-024-00556-6 |
| spellingShingle | Jin Hong Kim Seoung-Hun Kang Duhee Yoon Hakseong Kim Jin-Soo Kim Mohd Musaib Haidari Dong Jin Jang Jin-Yong Ko Young-Woo Son Bae Ho Park Jin Sik Choi Twist angle-dependent transport properties of twisted bilayer graphene NPG Asia Materials |
| title | Twist angle-dependent transport properties of twisted bilayer graphene |
| title_full | Twist angle-dependent transport properties of twisted bilayer graphene |
| title_fullStr | Twist angle-dependent transport properties of twisted bilayer graphene |
| title_full_unstemmed | Twist angle-dependent transport properties of twisted bilayer graphene |
| title_short | Twist angle-dependent transport properties of twisted bilayer graphene |
| title_sort | twist angle dependent transport properties of twisted bilayer graphene |
| url | https://doi.org/10.1038/s41427-024-00556-6 |
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