We report modeling results for low-field mobility and velocity saturation in bilayer graphene based on a newly developed semiclassical transport Monte-Carlo simulator validated by comparison with momentum relaxation time (MRT) calculations. We show that remote phonons originating in the dielectric stack are expected to strongly affect the mobility, although assessing their actual influence at high inversion charge requires the development of an accurate model for dynamic screening. When the applied bias opens the energy gap, the mobility is significantly reduced. The saturation velocity is expected to be as high as 3×107 cm/s and less degraded than mobility by bandgap opening.
Phonon Limited Uniform Transport in Bilayer Graphene Transistors / Paussa, Alan; Bresciani, Marco; Esseni, David; Palestri, Pierpaolo; Selmi, Luca. - (2011), pp. 307-310. (Intervento presentato al convegno 41st European Solid-State Device Research Conference, ESSDERC 2011 tenutosi a Helsinki, fin nel September 2011) [10.1109/ESSDERC.2011.6044173].
Phonon Limited Uniform Transport in Bilayer Graphene Transistors
PALESTRI, Pierpaolo;SELMI, Luca
2011
Abstract
We report modeling results for low-field mobility and velocity saturation in bilayer graphene based on a newly developed semiclassical transport Monte-Carlo simulator validated by comparison with momentum relaxation time (MRT) calculations. We show that remote phonons originating in the dielectric stack are expected to strongly affect the mobility, although assessing their actual influence at high inversion charge requires the development of an accurate model for dynamic screening. When the applied bias opens the energy gap, the mobility is significantly reduced. The saturation velocity is expected to be as high as 3×107 cm/s and less degraded than mobility by bandgap opening.File | Dimensione | Formato | |
---|---|---|---|
PAUSSA_ESSDERC_2011.pdf
Accesso riservato
Dimensione
401.49 kB
Formato
Adobe PDF
|
401.49 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris