Naslov
Optimum contact configurations for quasi-one-dimensional phosphorene nanodevices

Autori
Poljak, Mirko ; Matić, Mislav

Izvornik
Nanomaterials (2079-4991) 13 (2023), 11; 1759, 12

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

Ključne riječi
phosphorene ; nanoribbon ; quantum transport ; NEGF ; simulation ; transfer length ; contact resistance ; quasi-one-dimensional

Sažetak
We employ atomistic quantum transport simulations of quasi-one-dimensional (quasi-1D) phosphorene, or phosphorene nanoribbons (PNRs), to explore routes towards minimizing contact resistance (RC) in devices based on such nanostructures. The impact of PNR width scaling from ~5.5 nm down to ~0.5 nm, different hybrid edge-and-top metal contact configurations, and various metal-channel interaction strengths on the transfer length and RC is studied in detail. We demonstrate that optimum metals and top-contact lengths exist and depend on PNR width, which is a consequence of resonant transport and broadening effects. We find that moderately-interacting metals and nearly-edge contacts are optimum only for wider PNRs and phosphorene, providing minimum RC of ~280 Ωμm. Surprisingly, ultra-narrow PNRs benefit from weakly-interacting metals combined with long top contacts that lead to an added RC of only ~2 Ωμm in the 0.49 nm-wide quasi-1D phosphorene nanodevice.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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