Chiral topological excitons in the monolayer transition metal dichalcogenides

Abstract

We theoretically investigate the chiral topological excitons emerging in the monolayer transition metal dichalcogenides, where a bulk energy gap of valley excitons is opened up by a position dependent external magnetic field. We find two emerging chiral topological nontrivial excitons states, which exactly connects to the bulk topological properties, i.e., Chern number =2. The dependences of the spectrum of the chiral topological excitons on the width of the magnetic field domain wall as well as the magnetic filed strength are numerically revealed. The chiral topological valley excitons are not only important to the excitonic transport due to prevention of the backscattering, but also give rise to the quantum coherent control in the optoelectronic applications.

9 pages, 3 figures

References in corpus (16)

• The electronic properties of graphene
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Valley polarization in MoS2 monolayers by optical pumping
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
• Electronic States of Graphene Nanoribbons
• Magnetic Control of Valley Pseudospin in Monolayer WSe2
• Edge states in Graphene: from gapped flat band to gapless chiral modes
• Time-reversal symmetry breaking in circuit-QED based photon lattices
• Polariton $\mathbb{Z}$ Topological Insulator
• Topological Polaritons and Excitons in Garden Variety Systems
• Fractional Quantum Hall State in Coupled Cavities
• Localized states at zigzag edges of bilayer graphene

Cited by in corpus (6)

• Chiral excitonic order from twofold van Hove singularities in kagome metals
• Chiral Topological Excitons in a Chern Band Insulator
• Interaction-induced crystalline topology of excitons
• Textured Exciton Insulators
• Exciton Berryology
• Optical selection rules of topological excitons in flat bands