Naslov
Quantum transport analysis of conductance variability in graphene nanoribbons with edge defects

Autori
Poljak, Mirko ; Suligoj, Tomislav

Izvornik
IEEE transactions on electron devices (0018-9383) 63 (2016), 2; 537-543

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
atomistic simulation; quantum transport; NEGF; graphene nanoribbons; edge defects; conductivity; variability

Sažetak
We study the influence of edge defects and the downscaling of graphene nanoribbon (GNR) width (W) on the ON and OFF state conductance (GON and GOFF), and the ON-OFF conductance ratio (GON/GOFF). The averaged properties and the variability is explored by simulating ensembles of defected GNRs with various percentages of edge defects using atomistic quantum transport simulations. We find that even 10% edge defects decrease GON by at least 40%, even in the widest simulated GNRs, and that GON scales as ~W^2 for W > 3.2 nm, and ~W^9 for W < 1.8 nm. The relative variability of GON (3σ compared to average) increases from ~30% to ~1000% when the width is scaled from 4.8 to 1.1 nm. Furthermore, while its variability can reach orders of magnitude, we find that there exists the optimum nanoribbon width range between 1.8 and 3.3 nm in terms of GON/GOFF in GNRs with edge defects.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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