Electronic transport through a silicene-based zigzag and armchair junction

TL;DR

This study uses density functional theory and non-equilibrium Green's function methods to analyze electronic transport in silicene nanoribbon junctions, revealing conductance trends and negative differential resistance in specific configurations.

Contribution

It provides a detailed theoretical analysis of transport properties and NDR behavior in silicene nanoribbon junctions, a novel insight into silicene-based nanoelectronic devices.

Findings

Differential conductance decreases with system size (5-ZAZ > 4-ZAZ > 3-ZAZ)

Negative differential resistance observed in 3-ZAZ nanoribbons

Transmission spectra elucidate the NDR mechanism

Abstract

Using density functional theory and non-equilibrium Greens function technique, we performed theoretical investigations on the transport properties of several ZAZ SiNRs junctions,a similar kind of silicene molecules junction combined by zigzag and armchair silicene nanoribbons. It is found that the differential conductances of the three systems decrease with an order of 5-ZAZ>4-ZAZ>3-ZAZ.Particularly,the Negative differential resistance can be observed within certain bias voltage range only in 3-ZAZ SiNRs. In order to elucidate the mechanism the NDR behavior, the transmission spectra and molecular projected selfconsistent Hamiltonian states are discussed in details.