Title :
Finite-Size Effects on Thermionic Emission in Metal–Graphene-Nanoribbon Contacts
Author :
Mao, Ling-Feng ; Li, X.J. ; Zhu, C.Y. ; Wang, Z.O. ; Lu, Z.H. ; Yang, J.F. ; Zhu, H.W. ; Liu, Y.S. ; Wang, J.Y.
Author_Institution :
Sch. of Electron. & Inf. Eng., Soochow Univ., Suzhou, China
fDate :
5/1/2010 12:00:00 AM
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.
Keywords :
current density; graphene; nanostructured materials; semiconductor-metal boundaries; thermionic emission; C; current density; finite size effect; high energy state; metal graphene nanoribbon contacts; thermionic emission; Finite-size effect; graphene nanoribbon; metal/semiconductor contact; thermionic emission (TE);
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2010.2043639
