Naslov
Impact of Contact Configuration on Contact Resistance in Ultra-Narrow Graphene Nanoribbon Devices

Autori
Poljak, Mirko ; Matić, Mislav ; Zeljko, Ante

Izvornik
IEEE Transactions on Electron Devices (0018-9383) 69 (2022), 9; 5283-5288

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

Ključne riječi
contact resistance, edge contact, top contact, contact configuration, graphene nanoribbon, atomistic simulation, quantum transport, NEGF

Sažetak
Contact resistance strongly deteriorates the performance of devices based on two-dimensional materials and their nanostructures, masking their exceptional electronic and transport properties. This work explores the dependence of contact resistance (RC) of graphene nanoribbon (GNR) devices on contact geometry using atomistic quantum transport simulations. The influence and contributions of edge and top contacts and GNR width scaling on RC is studied in detail. Metallization effects on density of states, transmission, and GNR field-effect transistor (GNR FET) driving current are investigated. We show that wider GNRs (~4 nm) exhibit edge-dominated transport and lower RC than the ultra-narrow GNRs (~0.4 nm) that exhibit much higher contact resistance which is also dependent on contact area.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA