(Color online) Schematic of the device: (a) Model M1, (b) Model M2, (c) Model M3, and (d) Model M4.
(Color online) (a) I-V curves of all models in the bias region from − 3 to 3 V (a subfigure of model M3 is provided). (b) The rectification ratios change with bias for the models.
(Color online) Transmission spectra and electrostatic potential distribution of our models at zero bias.
(Color online) Transmission spectra of our models under various biases.
(Color online) MPSH of models M1 to M4 at representative biases in real space.
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