The electronic and transport properties of zigzag β-antimonene nanoribbons

The electronic and transport properties of zigzag β-antimonene nanoribbons (Z- SbNRs) are investigated based on density function theory (DFT) and non-equilibrium Green's functions (NEGF). The calculated band structure of Z-SbNRs shows a typical semiconductor characteristic. For Z-SbNRs, the band gap decreases monotonically with the increase of ribbon width. Moreover, it is found that the width and the length of central scattering region have a great effect on the electronic transport property of Z-SbNRs. The I-V curve of the two-probe device shows the current is almost zero when the bias voltage is lower than the threshold voltage of 2.0 V. However, when the bias voltage is higher than the threshold voltage, the transport channels are opened and the current increases quickly.