2018/10/06 by Mohsen Amini, M. Amini, Mohsen Soltani +1
Materials Science · Mathematics · Physics and Astronomy · #2D Materials and Applications #Band gap #Condensed matter physics #Electronic structure #Enhanced Data Rates for GSM Evolution #Geometry #Graphene #Graphene nanoribbons #Graphene research and applications #Impurity #Lattice (music) #MXene and MAX Phase Materials #Materials science #Mathematics #Phosphorene #Physics #Quantum mechanics #Ribbon #Telecommunications #Tight binding #Zigzag #cond-mat.dis-nn #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/1361-648x/ab09b8
published as J. Phys.: Condens. Matter 31 (2019) 215301 (11pp)
arxiv created 2018/10/06 · openalex publication_date 2019/02/22 · arxiv updated 2019/03/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Zigzag phosphorene nanoribbons have quasi-flat band edge modes entirely detached from bulk states. We analytically study the electronic transport through such edge states in the presence of a localized defect for semi-infinite and finite ribbon widths. Using the tight-binding model, we derive analytical expressions for the Green's function and transmission amplitude of both pristine and defective nanoribbons. We find that the transmission of ribbons with both semi-infinite and finite width is sensitive to the location of a single impurity defect with respect to the edge. By the presence of an impurity on the outermost edge site of the ribbon, the transmission through the edge channel, similar to a one-dimensional chain, strongly suppresses for the entire energy spectrum of the quasi-flat band. In contrast, the transmission of low-energy [Formula: see text] states, is robust as the impurity is moved one position far away from the edge on the same sub-lattice. The analytical calculations are also complemented by exact numerical transport computations using the Landauer approach.