Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width
A tight-binding approach comprising a pz orbital basis set is employed to induce a bandgap in massless Dirac Fermion, graphene. The role of the structural parameter, chirality, has been explored to determine the electronic band structure of armchair graphene nanoribbon (AGNR). The present results...
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| Format: | Article |
| Language: | English |
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Prince of Songkla University
2022-04-01
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| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | https://rdo.psu.ac.th/sjst/journal/44-2/1.pdf |
| _version_ | 1798026386616614912 |
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| author | Monika Khetarpal |
| author_facet | Monika Khetarpal |
| author_sort | Monika Khetarpal |
| collection | DOAJ |
| description | A tight-binding approach comprising a pz orbital basis set is employed to induce a bandgap in massless Dirac Fermion,
graphene. The role of the structural parameter, chirality, has been explored to determine the electronic band structure of armchair
graphene nanoribbon (AGNR). The present results show that the key parameter, the bandgap in quasi-one-dimensional graphene
nanoribbon, arises from quantum confinement. It is observed that the total number of carbon atoms present in the overall unit cell
of AGNR is equal to the total number of subbands in the corresponding electronic structure. Important band structure parameter
effective mass is computed from the parabolic region of the band structure. A decreasing trend of energy bandgap and effective
mass as a function of width has been reported. Our results demonstrated that armchair graphene nanoribbon can be divided into
three families 3p, 3p+1, and 3p+2, p is an integer. In addition, the electronic density of states at different chirality values has been
studied, to support our findings of the electronic band structure. |
| first_indexed | 2024-04-11T18:34:30Z |
| format | Article |
| id | doaj.art-9bb2c63c36124fab9a10d63d9eaf89e3 |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-04-11T18:34:30Z |
| publishDate | 2022-04-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-9bb2c63c36124fab9a10d63d9eaf89e32022-12-22T04:09:19ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952022-04-0144228929510.14456/sjst-psu.2022.41Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with widthMonika Khetarpal0Department of Physics, Government Dungar College, Bikaner, 334001 IndiaA tight-binding approach comprising a pz orbital basis set is employed to induce a bandgap in massless Dirac Fermion, graphene. The role of the structural parameter, chirality, has been explored to determine the electronic band structure of armchair graphene nanoribbon (AGNR). The present results show that the key parameter, the bandgap in quasi-one-dimensional graphene nanoribbon, arises from quantum confinement. It is observed that the total number of carbon atoms present in the overall unit cell of AGNR is equal to the total number of subbands in the corresponding electronic structure. Important band structure parameter effective mass is computed from the parabolic region of the band structure. A decreasing trend of energy bandgap and effective mass as a function of width has been reported. Our results demonstrated that armchair graphene nanoribbon can be divided into three families 3p, 3p+1, and 3p+2, p is an integer. In addition, the electronic density of states at different chirality values has been studied, to support our findings of the electronic band structure.https://rdo.psu.ac.th/sjst/journal/44-2/1.pdfagnrelectronic band structureeffective massnano-ribbon width |
| spellingShingle | Monika Khetarpal Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width Songklanakarin Journal of Science and Technology (SJST) agnr electronic band structure effective mass nano-ribbon width |
| title | Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width |
| title_full | Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width |
| title_fullStr | Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width |
| title_full_unstemmed | Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width |
| title_short | Quasi-one-dimensional graphene structure: Study of finite bandgap and effective mass with width |
| title_sort | quasi one dimensional graphene structure study of finite bandgap and effective mass with width |
| topic | agnr electronic band structure effective mass nano-ribbon width |
| url | https://rdo.psu.ac.th/sjst/journal/44-2/1.pdf |
| work_keys_str_mv | AT monikakhetarpal quasionedimensionalgraphenestructurestudyoffinitebandgapandeffectivemasswithwidth |