Fig. 1: 3D VRRAM single device structure.
From: Graphene-based 3D XNOR-VRRAM with ternary precision for neuromorphic computing
a, b Single device cross-sectional schematic for a Pt and b graphene plane electrode-based VRRAM with two layers. In this work, TiN/HfOx/graphene and TiN/HfOx/Pt 3D VRRAM structure can be further referred to as Gr-RRAM and Pt-RRAM, respectively. c High-resolution TEM image of Pt-RRAM device from previous work34 (Scale bar: 5 nm). d High-resolution TEM image of Gr-RRAM device (Scale bar: 30 nm). e Layer 1 example image, where graphene was transferred on top of the Al2O3 layer serving as an adhesion promoter. (Scale bar: 5 nm). f Typical semilogarithmic I–V curve of the top and bottom layers for both Pt- and Gr-RRAM devices.
