Plasmons on the edge of MoS2 nanostructures

Abstract

Using ab initio calculations we predict the existence of one-dimensional (1D), atomically confined plasmons at the edges of a zigzag MoS2 nanoribbon. The strongest plasmon originates from a metallic edge state localized on the sulfur dimers decorating the Mo edge of the ribbon. A detailed analysis of the dielectric function reveals that the observed deviations from the ideal 1D plasmon behavior result from single-particle transitions between the metallic edge state and the valence and conduction bands of the MoS2 sheet. The Mo and S edges of the ribbon are clearly distinguishable in calculated spatially resolved electron energy loss spectrum owing to the different plasmonic properties of the two edges. The edge plasmons could potentially be utilized for tuning the photocatalytic activity of MoS2 nanoparticles.

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• Anisotropic plasmons, excitons and electron energy loss spectroscopy of phosphorene
• Nonlinear dark-field imaging of 1D defects in monolayer dichalcogenides
• Electronic transport in disordered MoS${}_2$ nanoribbons
• Plasmons in MoS2 Studied via Experimental and Theoretical Correlation of Energy Loss Spectra
• Flat-band plasmons in twisted bilayer transition metal dichalcogenides
• Green${}^{\prime }$s function approach to edge states in transition metal dichalcogenides
• Intrinsic edge excitons in two-dimensional MoS${}_2$
• Plasmons in phosphorene nanoribbons
• Stability of edge magnetism against disorder in zigzag MoS${}_2$ nanoribbons
• Collective excitations in two-component one-dimensional massless Dirac plasma
• Exact long-range dielectric screening and interatomic force constants in quasi-2D crystals