Antichiral states in twisted graphene multilayers

Abstract

The advent of topological phases of matter revealed a variety of observed boundary phenomena, such as chiral and helical modes found at the edges of two-dimensional (2D) topological insulators. Antichiral states in 2D semimetals, i.e., copropagating edge modes on opposite edges compensated by a counterpropagating bulk current, are also predicted, but, to date, no realization of such states in a solid-state system has been found. Here, we put forward a procedure to realize antichiral states in twisted van der Waals multilayers, by combining the electronic Dirac-cone spectra of each layer through the combination of the orbital moiré superstructure, an in-plane magnetic field, and inter-layer bias voltage. In particular, we demonstrate that a twisted van der Waals heterostructure consisting of graphene/two layers of hexagonal boron nitride [(hBN)${}_2$]/graphene will show antichiral states at in-plane magnetic fields of 8 T, for a rotation angle of 0.2${}^{\circ }$ between the graphene layers. Our findings engender a controllable procedure to engineer antichiral states in solid-state systems, as well as in quantum engineered metamaterials.

7 pages, 6 figures

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Cited by in corpus (12)

• Observation of photonic antichiral edge states
• Observation of Antichiral Edge States in a Circuit Lattice
• Anti-chiral edge states and hinge states based on the Haldane model
• Observation of non-Hermitian antichiral edge currents
• Copropagating edge states produced by the interaction between electrons and chiral phonons in two-dimensional materials
• Bulk-edge correspondence in two-dimensional topological semimetals: A transfer matrix study of antichiral edge modes
• Anti-helical edge magnons in patterned antiferromagnetic thin film
• Antichiral surface states and Su-Schrieffer-Heeger physics in rutile altermagnets
• Reduction of Interlayer Interaction in Multilayer Stacking Graphene with Carbon Nanotube Insertion: Insights from Experiment and Simulation
• Renormalized Magic Angles in Asymmetric Twisted Graphene Multilayers
• Generation and control of non-local chiral currents in graphene superlattices by orbital Hall effect
• Synchronized in-gap edge states and robust copropagation in topological insulators without magnetic flux