Effect of edge decoration on the energy spectrum of semi-infinite lattices

Abstract

Analytical studies of the effect of edge decoration on the energy spectrum of semi-infinite one-dimensional (1D) lattice chain with Peierls phase transition and zigzag edged graphene (ZEG) are presented by means of transfer matrix method, in the frame of which the sufficient and necessary conditions for the existence of the edge states are determined. For 1D lattice chain, the zero-energy edge state exists when Peierls phase transition happens regardless whether the decoration exists or not, while the non-zero-energy edge states can be induced and manipulated through adjusting the edge decoration. On the other hand, the semi-infinite ZEG model with nearest-neighbor interaction can be mapped into the 1D lattice chain case. The non-zero-energy edge states can be induced by the decoration as well, and we can obtain the condition of the decoration on the edge for the existence of the novel edge states.

6 pages,4 figures

References in corpus (11)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Energy gaps, topological insulator state and zero-field quantum Hall effect in graphene by strain engineering
• Electronic States of Graphene Nanoribbons
• All-graphene integrated circuits via strain engineering
• Edge states in Graphene: from gapped flat band to gapless chiral modes
• Observation of surface gap solitons in semi-infinite waveguide arrays
• Discrete solitons and nonlinear surface modes in semi-infinite waveguide arrays
• Vibrational Tamm states at the edges of graphene nanoribbons
• Transition from ballistic to diffusive behavior of graphene ribbons in the presence of warping and charged impurities
• Analytical study of non-linear transport across a semiconductor-metal junction