Theoretical Study On Transport Properties Of Silicene Nanoribbons Under Different Boundary Conditions

In recent years,as a new type of two-dimensional nanomaterial,silicene has become a research hotspot due to its special transport properties.The research results of the researchers on the transport properties of quasi-one-dimensional silicene nanoribbon with fixed boundary conditions have made the 2D material more clearly known to us.In order to study the transport properties of silicene nanoribbons under different boundary conditions,in this paper,we will study the transport properties of silicene nanoribbon under different boundary conditions by using the non-equilibrium Green's function method and the method of muti-channel transmission coefficient calculation,and then take advantage of Matlab software to carry out numerical calculation and discuss them in detail.Considering the Rashba spin-orbit coupling and intrinsic spin-orbit coupling,the addition of a vertical electric field to the silicene material,as a result,the degeneracy of the energy levels in both fixed and periodic boundary conditions is removed.In the case of?_SO?28??_?,under the periodic boundary conditions,the silicene material has a linear crossing of between the conduction band and the valence band;The robustness of edge state transmission has a positive effect on system transport;Under the fixed boundary condition,the closer the channels of the silicene material are to the edge,the slower the attenuation of the transmission probability with the length of the nanoribbon and the disorder strength;However,under the periodic boundary condition,the transmission coefficient of each channel of silicene material decreases almost at the same rate with the length of nanoribbon and the disordered strength;In the absence of impurities,as the intrinsic spin orbital coupling strength?_SO or Rashba spin orbital coupling strength_R?increases,the transmission probability of silicene nanoribbons shows a stepwise decreasing trend under two boundary conditions,but the width of each platform is not equal.We hope that through the research of this paper we can discover more novel properties of silicene nanomaterials,provide a certain theoretical basis for the manufacture of silicene electronics nanomaterials,and promote the combination and development of silicone-based and modern electronics industry.