Edge modes in zigzag and armchair ribbons of monolayer MoS${}_2$

Abstract

We explore the electronic structure, orbital character and topological aspect of a monolayer MoS${}_2$ nanoribbon using tight-binding (TB) and low-energy ($\mathbf{k}\cdot \mathbf{p}$) models. We obtain a mid-gap edge mode in the zigzag ribbon of monolayer MoS${}_2$, which can be traced back to the topological properties of the bulk band structure. Monolayer MoS${}_2$ can be considered as a valley Hall insulator. The boundary conditions at armchair edges mix the valleys on the edges, and a gap is induced in the edge modes. The spin-orbit coupling in the valence band reduces the hybridization of the bulk states.

28 pages, 13 figures, Published:J. Phys.: Condens. Matter 28 (2016) 495001

References in corpus (11)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Electronic States of Graphene Nanoribbons
• Mechanical and Electronic Properties of MoS${}_2$ Nanoribbons and Their Defects
• Edge states in Graphene: from gapped flat band to gapless chiral modes
• Intrinsic spin Hall effect in monolayers of group-VI dichalcogenides: A first-principles study
• Theory of strain in single-layer transition metal dichalcogenides
• Emergence of one-dimensional wires of free carriers in transition-metal-dichalcogenide nanostructures
• Valley Zeeman effect and spin-valley polarized conductance in monolayer MoS${}_2$ in a perpendicular magnetic field
• Intrinsic optical conductivity of modified-Dirac fermion systems
• Localized States at Zigzag Edges of Multilayer Graphene and Graphite Steps
• Boundary conditions for transition-metal dichalcogenide monolayers in the continuum model

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