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Band alignment in SiC-based one-dimensional van der Waals homojunctions |
| Xing-Yi Tan(谭兴毅)1,2,†, Lin-Jie Ding(丁林杰)1, and Da-Hua Ren(任达华)2 |
1 Department of Physics, Chongqing Three Gorges University, Wanzhou 404100, China;
2 School of Information Engineering, Hubei Minzu University, Enshi 445000, China |
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Abstract The density functional theory method is utilized to verify the electronic structures of SiC nanotubes (SiCNTs) and SiC nanoribbons (SiCNRs) one-dimensional (1D) van der Waals homojunctions (vdWh) under an applied axial strain and an external electric field. According to the calculated results, the SiCNTs/SiCNRs 1D vdWhs are direct semiconductors with a type-II band alignment and robust electronic structures with different diameters or widths. Furthermore, the SiCNTs/SiCNRs 1D vdWhs are direct semiconductors with a type-I band alignment, respectively, in a range of[-0.3, -0.1] V/Å and[0.1, 0.3] V/Å and change into metal when the electric field intensity is equal to or higher than 0.4 V/Å. Interestingly, the SiCNTs/SiCNRs 1D vdWhs have robust electronic structures under axial strain. These findings demonstrate theoretically that the SiCNTs/SiCNRs 1D vdWhs can be employed in nanoelectronics devices.
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Received: 25 March 2021
Revised: 24 April 2021
Accepted manuscript online: 27 April 2021
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PACS:
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61.72.uj
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(III-V and II-VI semiconductors)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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74.78.Fk
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(Multilayers, superlattices, heterostructures)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11864011), the Youth Project of Scientific and Technological Research Program of Chongqing Education Commission, China (Grant Nos. KJQN202001207 and KJQN202101204), and the Fund from the Educational Commission of Hubei Province, China (Grant No. T201914). |
Corresponding Authors:
Xing-Yi Tan
E-mail: tanxy@sanxiau.edu.cn
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Cite this article:
Xing-Yi Tan(谭兴毅), Lin-Jie Ding(丁林杰), and Da-Hua Ren(任达华) Band alignment in SiC-based one-dimensional van der Waals homojunctions 2021 Chin. Phys. B 30 126102
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