Electrical and Electronic Engineering - Research Publications
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ItemAll-Graphene Planar Double-Quantum-Dot Resonant Tunneling Diodes(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2016-01)
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ItemHighly Effective Conductance Modulation in Planar Silicene Field Effect Devices Due to Buckling(NATURE PORTFOLIO, 2015-10-06)Silicene is an exciting two-dimensional material that shares many of graphene's electronic properties, but differs in its structural buckling. This buckling allows opening a bandgap in silicene through the application of a perpendicular electric field. Here we show that this buckling also enables highly effective modulation of silicene's conductance by means of an in-plane electric field applied through silicene side gates, which can be realized concurrently within the same silicene monolayer. We illustrate this by using silicene to implement Self-Switching Diodes (SSDs), which are two-dimensional field effect nanorectifiers realized within a single silicene monolayer. Our quantum simulation results show that the atomically-thin silicene SSDs, with sub-10 nm dimensions, achieve a current rectification ratio that exceeds 200, without the need for doping, representing a 30 fold enhancement over graphene SSDs. We attribute this enhancement to a bandgap opening due to the in-plane electric field, as a consequence of silicene's buckling. Our results suggest that silicene is a promising material for the realization of planar field effect devices.
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ItemNo Preview AvailableGraphene Field Effect Nanopore Glycine Detector(IEEE, 2014)