All-graphene planar self-switching MISFEDs, Metal-Insulator-Semiconductor Field-Effect Diodes.
Graphene normally behaves as a semimetal because it lacks a bandgap, but when it is patterned into nanoribbons a bandgap can be introduced. By varying the width of these nanoribbons this band gap can be tuned from semiconducting to metallic. This property allows metallic and semiconducting regions within a single Graphene monolayer, which can be used in realising two-dimensional (2D) planar Metal-Insulator-Semiconductor field effect devices. Based on this concept, we present a new class of nano-scale planar devices named Graphene Self-Switching MISFEDs (Metal-Insulator-Semiconductor Field-Effect Diodes), in which Graphene is used as the metal and the semiconductor concurrently. The presented devices exhibit excellent current-voltage characteristics while occupying an ultra-small area with sub-10 nm dimensions and an ultimate thinness of a single atom. Quantum mechanical simulation results, based on the Extended Huckel method and Nonequilibrium Green's Function Formalism, show that a Graphene Self-Switching MISFED with a channel as short as 5 nm can achieve forward-to-reverse current rectification ratios exceeding 5000.
1] Department of Electrical and Electronic Engineering, University of Melbourne, VIC 3010, Australia [2] Optics and Nanoelectronics Research Group, National ICT Australia, VIC 3010, Australia [3] Centre for Neural Engineering, University of Melbourne, VIC 3010, Australia.
Feras
F
Al-Dirini
1] Department of Electrical and Electronic Engineering, University of Melbourne, VIC 3010, Australia [2] Optics and Nanoelectronics Research Group, National ICT Australia, VIC 3010, Australia [3] Centre for Neural Engineering, University of Melbourne, VIC 3010, Australia.
Faruque M
FM
Hossain
1] Department of Electrical and Electronic Engineering, University of Melbourne, VIC 3010, Australia [2] Optics and Nanoelectronics Research Group, National ICT Australia, VIC 3010, Australia.
Ampalavanapillai
A
Nirmalathas
1] Department of Electrical and Electronic Engineering, University of Melbourne, VIC 3010, Australia [2] Optics and Nanoelectronics Research Group, National ICT Australia, VIC 3010, Australia [3] Centre for Neural Engineering, University of Melbourne, VIC 3010, Australia.
Efstratios
E
Skafidas