Lateral heterostructures and one-dimensional interfaces in 2D transition metal dichalcogenides

Abstract

The growth and exfoliation of two-dimensional (2D) materials have led to the creation of edges and novel interfacial states at the juncture between crystals with different composition or phases. These hybrid heterostructures (HSs) can be built as vertical van der Waals \emph{stacks}, resulting in a 2D interface, or as \emph{stitched} adjacent monolayer crystals, resulting in one-dimensional (1D) interfaces. Although most attention has been focused on vertical HSs, increasing theoretical and experimental interest in 1D interfaces is evident. In-plane interfacial states between different 2D materials inherit properties from both crystals, giving rise to robust states with unique 1D non-parabolic dispersion and strong spin-orbit effects. With such unique characteristics, these states provide an exciting platform for realizing 1D physics. Here, we review and discuss advances in 1D heterojunctions, with emphasis on theoretical approaches for describing those between semiconducting transition metal dichalcogenides $M{X}_2$ (with $M$=Mo, W and $X$= S, Se, Te), and how the interfacial states can be characterized and utilized. We also address how the interfaces depend on edge geometries (such as zigzag and armchair) or strain, as lattice parameters differ across the interface, and how these features affect excitonic/optical response. This review is intended to serve as a resource for promoting theoretical and experimental studies in this rapidly evolving field.

arXiv comment34 pages, 21 figures. Invited review

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Cited by in corpus (10)

• Theory of tunable flux lattices in the homobilayer moiré of twisted and uniformly strained transition metal dichalcogenides
• Magnon valley Hall effect in CrI3-based vdW heterostructures
• Electron-photon Chern number in cavity-embedded 2D moiré materials
• Strain tunable pudding-mold-type band structure and thermoelectric properties of SnP${}_3$ monolayer
• Growth and applications of two-dimensional single crystals
• Edge magnetism in transition metal dichalcogenide nanoribbons: Mean field theory and determinant quantum Monte Carlo
• Atomically sharp 1D interfaces in 2D lateral heterostructures of VSe${}_2$-NbSe${}_2$ monolayers
• Tunable Contact Resistance in Transition Metal Dichalcogenide Lateral Heterojunctions
• Electrically tunable MoSe${}_2$/WSe${}_2$ heterostructure-based quantum dot
• Spin polarization in Lateral two-dimensional Heterostructures