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Quasi-one-dimensional graphene structure:Study of finite bandgap and effective mass with width |
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| รหัสดีโอไอ | |
| Creator | Monika Khetarpal |
| Title | Quasi-one-dimensional graphene structure:Study of finite bandgap and effective mass with width |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2565 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 2 |
| Page no. | 289-295 |
| Keyword | AGNR, electronic band structure, effective mass, nano-ribbon width |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | 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 armchairgraphene nanoribbon (AGNR). The present results show that the key parameter, the bandgap in quasi-one-dimensional graphenenanoribbon, arises from quantum confinement. It is observed that the total number of carbon atoms present in the overall unit cellof AGNR is equal to the total number of subbands in the corresponding electronic structure. Important band structure parametereffective mass is computed from the parabolic region of the band structure. A decreasing trend of energy bandgap and effectivemass as a function of width has been reported. Our results demonstrated that armchair graphene nanoribbon can be divided intothree families 3p, 3p+1, and 3p+2, p is an integer. In addition, the electronic density of states at different chirality values has beenstudied, to support our findings of the electronic band structure. |
