Naslov
Influence of edge defects, vacancies and potential fluctuations on transport properties of extremely-scaled graphene nanoribbons

Autori
Poljak, Mirko ; Song, Emil B. ; Wang, Minsheng ; Suligoj, Tomislav ; Wang, Kang L.

Izvornik
IEEE transactions on electron devices (0018-9383) 59 (2012), 12; 3231-3238

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

Ključne riječi
graphene nanoribbons; NEGF simulation; edge defects; vacancies; potential fluctuations; transport gap

Sažetak
Atomistic quantum transport simulations of a large ensemble of devices are employed to investigate the impact of different sources of disorder on transport properties of extremely-scaled (length of 10 nm, width of 1–4 nm) graphene nanoribbons. We report the dependence of transport gap, ON- and OFF-state conductance, and ON-OFF ratio on edge-defect density, vacancy density and potential fluctuation amplitude. For the smallest devices and realistic lattice defect densities, transport gap increases by up to ~300%, and ON-OFF ratio reaches almost ~10^6. We also report a rather high variation of transport gap and ON-OFF ratio. In contrast, we find that the potential fluctuations have a negligible impact on the transport gap and cause a relatively modest increase of the ON-OFF ratio.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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