Finite-size effects on thermionic emission in metal-graphene-nanoribbon contacts
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Authors
Mao, Ling-Feng
Li, Xijun
Zhu, C Y
Wang, Z O
Lu, Z H
Yang, J F
Zhu, H W
Liu, Y S
Wang, J Y
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Volume Title
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Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
A finite-size effect leads to more electrons to occupy high-energy states in a graphene nanoribbon. Therefore, the thermionic-emission (TE) current density of a metal/graphene nanoribbon changes with its width when the graphene nanoribbon is a semiconductor. This letter demonstrates that the TE current density increases rapidly with the decreasing width of the graphene nanoribbon. It is also found that the finite-size effect on TE current density is more significant at low temperatures.
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IEEE Electron Device Letters
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2037-12-31
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