A mode space tight-binding approach for the simulation of armchair graphene nanoribbon FETs is discussed. It makes use of slab-dependent modes and a novel criterion for mode selection going beyond the one based on the lowest energy subbands. For ideal ribbons we show that, by splitting the modes into decoupled groups, the new method provides results almost identical to the real space with a speedup of more than one order of magnitude. Even in the presence of edge roughness, which tends to couple the modes, the mode space approach still offers a sizable computational advantage with respect to the real space, while retaining a good accuracy.

Mode Space Approach for Tight-Binding Transport Simulation in Graphene Nanoribbon FETs

GRASSI, ROBERTO;GNUDI, ANTONIO;GNANI, ELENA;REGGIANI, SUSANNA;BACCARANI, GIORGIO
2009

Abstract

A mode space tight-binding approach for the simulation of armchair graphene nanoribbon FETs is discussed. It makes use of slab-dependent modes and a novel criterion for mode selection going beyond the one based on the lowest energy subbands. For ideal ribbons we show that, by splitting the modes into decoupled groups, the new method provides results almost identical to the real space with a speedup of more than one order of magnitude. Even in the presence of edge roughness, which tends to couple the modes, the mode space approach still offers a sizable computational advantage with respect to the real space, while retaining a good accuracy.
Proc. 13th International Workshop on Computational Electronics
1
4
R. Grassi; A. Gnudi; E. Gnani; S. Reggiani; G. Baccarani
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/79240
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 0
social impact