Numerical study of quantum transport in the double-gate graphene nanoribbon field effect transistors

2011 ◽  
Vol 43 (9) ◽  
pp. 1708-1711 ◽  
Author(s):  
Hakimeh Mohammadpour ◽  
Asghar Asgari
Keyword(s):  
Quantum Transport ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Numerical Study ◽  
Graphene Nanoribbon ◽  
Double Gate

scholarly journals Analyses of Short Channel Effects of Single-Gate and Double-Gate Graphene Nanoribbon Field Effect Transistors

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Hojjatollah Sarvari ◽  
Amir Hossein Ghayour ◽  
Zhi Chen ◽  
Rahim Ghayour
Keyword(s):  
Threshold Voltage ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Tight Binding ◽  
Graphene Nanoribbon ◽  
Basis Set ◽  
Double Gate ◽  
Short Channel Effects ◽  
Short Channel ◽  
Channel Effects

Short channel effects of single-gate and double-gate graphene nanoribbon field effect transistors (GNRFETs) are studied based on the atomistic pz orbital model for the Hamiltonian of graphene nanoribbon using the nonequilibrium Green’s function formalism. A tight-binding Hamiltonian with an atomistic pz orbital basis set is used to describe the atomistic details in the channel of the GNRFETs. We have investigated the vital short channel effect parameters such as Ion and Ioff, the threshold voltage, the subthreshold swing, and the drain induced barrier lowering versus the channel length and oxide thickness of the GNRFETs in detail. The gate capacitance and the transconductance of both devices are also computed in order to calculate the intrinsic cut-off frequency and switching delay of GNRFETs. Furthermore, the effects of doping of the channel on the threshold voltage and the frequency response of the double-gate GNRFET are discussed. We have shown that the single-gate GNRFET suffers more from short channel effects if compared with those of the double-gate structure; however, both devices have nearly the same cut-off frequency in the range of terahertz. This work provides a collection of data comparing different features of short channel effects of the single gate with those of the double gate GNRFETs. The results give a very good insight into the devices and are very useful for their digital applications.

Double‐Gate MoS 2 Field‐Effect Transistors with Full‐Range Tunable Threshold Voltage for Multifunctional Logic Circuits

2021 ◽  
pp. 2101036
Author(s):  
Jiali Yi ◽  
Xingxia Sun ◽  
Chenguang Zhu ◽  
Shengman Li ◽  
Yong Liu ◽  
...  
Keyword(s):  
Threshold Voltage ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Full Range ◽  
Logic Circuits ◽  
Double Gate
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