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Effects of Localized Trap-States and Corrugation on Charge Transport in Graphene Nanoribbons

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Author(s): Oleksiy Roslyak | Upali Aparajita | Godfrey Gumbs | Danhong Huang

Journal: Electronics (Basel)
ISSN 2079-9292

Volume: 2;
Issue: 2;
Start page: 178;
Date: 2013;
Original page

Keywords: localized trap states | graphene nanoribbons | charge transport | surface acoustic wave

ABSTRACT
We investigate effects of the electron traps on adiabatic charge transport in graphene nanoribbons under a longitudinal surface acoustic wave (SAW) potential. Due to the weak SAW potential and strong transverse confinement of nanoribbons, minibands of sliding tunnel-coupled quantum dots are formed. Therefore, as the chemical potential passes through minigaps, quantized adiabatic charge transport is expected to occur. We analyze the condition for a closed minigap, thereby destroying the current quantization in a nanoribbon. We present numerical calculations showing the localized energy states within minigaps. Additionally, we compare the results with the minibands of corrugated nanoribbons.
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