Graphene-based modulation-doped superlattice structures

Details Graphene-based modulation-doped superlattice structures Graphene-based modulation-doped superlattice structures

2010-11-12

arxiv.org/abs/1011.2850v2

Journal of Experimental and Theoretical Physics 112, 102-107 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 figures

Scientific paper

10.1134/S1063776111010043

The electronic transport properties of graphene-based superlattice structures are investigated. A graphene-based modulation-doped superlattice structure geometry is proposed and consist of periodically arranged alternate layers: InAs/graphene/GaAs/graphene/GaSb. Undoped graphene/GaAs/graphene structure displays relatively high conductance and enhanced mobilities at elevated temperatures unlike modulation-doped superlattice structure more steady and less sensitive to temperature and robust electrical tunable control on the screening length scale. Thermionic current density exhibits enhanced behaviour due to presence of metallic (graphene) mono-layers in superlattice structure. The proposed superlattice structure might become of great use for new types of wide-band energy gap quantum devices.

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