CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electronic transport properties of an (8,0) carbon/boron nitride nanotube heterojunction |
Liu Hong-Xia(刘红霞)a)†, Zhang He-Ming(张鹤鸣) a), Song Jiu-Xu(宋久旭)a), and Zhang Zhi-Yong(张志勇) b) |
a Key Laboratory of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an 710071, China; b Information Science and Technology Institution, Northwest University, Xi'an 710069, China |
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Abstract The structure of a heterojunction made up of an (8, 0) carbon nanotube and an (8, 0) boron nitride nanotube is achieved through geometry optimization implemented in the CASTEP package. Based on the optimized geometry, the model of the heterojunction is established. Its transport properties are investigated by combining the nonequilibrium Green's function with density functional theory. Results show that both the lowest unoccupied molecular orbital and the highest occupied molecular orbital mainly locate on the carbon nanotube section. In the current--voltage characteristic of the heterojunction, a rectification feature is revealed.
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Received: 15 March 2009
Revised: 30 September 2009
Accepted manuscript online:
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PACS:
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73.63.Fg
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(Nanotubes)
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73.22.-f
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(Electronic structure of nanoscale materials and related systems)
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73.40.Kp
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(III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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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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73.40.Ei
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(Rectification)
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Fund: Project supported by the Chinese
Defence Advance Research Program of Science and Technology, China
(Grant No.~9140A08060407DZ0103). |
Cite this article:
Liu Hong-Xia(刘红霞), Zhang He-Ming(张鹤鸣), Song Jiu-Xu(宋久旭), and Zhang Zhi-Yong(张志勇) Electronic transport properties of an (8,0) carbon/boron nitride nanotube heterojunction 2010 Chin. Phys. B 19 037104
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