Abstract
Abstract
We study the electron transport in armchair graphene nanoribbon (AGNR) resonant tunneling diode (RTD) using square and V-shaped potential well profiles. We use non-equilibrium Green’s function formalism to analyze the transmission and I–V characteristics. Results show that an enhancement in the peak current (I
p
) can be obtained by reducing the well width (W
w
) or barrier width (W
b
). As W
w
decreases, I
p
shifts to a higher peak voltage (V
p
), while there is almost no change in V
p
with decreasing W
b
. It is gratifying to note that there is an enhancement in I
p
by about 1.6 times for a V-shaped well over a square well. Furthermore, in the case of a V-shaped well, the negative differential resistance occurs in a shorter voltage range, which may beneficial for ultra-fast switching and high-frequency signal generation. Our work anticipates the suitability of graphene having better design flexibility, to develop ideally 2D RTDs for use in ultra-dense nano-electronic circuits and systems.
Funder
Department of Science and Technology, Govt. of India
Subject
Condensed Matter Physics,Mathematical Physics,Atomic and Molecular Physics, and Optics
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献