Antichiral edge states in Heisenberg ferromagnet on a honeycomb lattice

Bhowmick, Dhiman; Sengupta, Pinaki

doi:10.1103/physrevb.101.195133

Cited by 49 publications

(25 citation statements)

References 31 publications

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“…These antichiral edge states can occur only in gapless systems, since they need the associated bulk states to propagate in the opposite direction as required by energy conservation. A series of platforms have been theoretically proposed that can potentially realize antichiral edge states, including graphene structures [22,23], exciton polariton strips [24], Heisenberg ferromagnets [25], and gyromagnetic photonic crystals [26]. However, due to the challenging configuration with broken time-reversal symmetry, antichiral edge states have not been observed in reality.…”

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confidence: 99%

Observation of Photonic Antichiral Edge States

et al. 2020

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confidence: 99%

Observation of Photonic Antichiral Edge States

et al. 2020

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“…We then determine the group velocities of the edge states by measuring the dwell time dφ/dω, where φ is the phase of the complex spin-up voltage measured by the pickup coils at each site, and ω is the angular frequency. The rate of change of dwell time with distance along the edge is the group velocity 19 . Figure 3c shows the experimental results for the dwell times on the top and bottom edges; each data point is estimated from spin-up voltage measurements at 5 equally-spaced frequencies between 112.5 kHz and 112.9 kHz ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Observation of Antichiral Edge States in a Circuit Lattice

Yang

Zhu²,

Hang³

et al. 2020

Preprint

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We constructed an electrical circuit to realize a modified Haldane lattice exhibiting the unusual phenomenon of antichiral edge states. The circuit consists of a network of inductors and capacitors with interconnections reproducing the effects of a magnetic vector potential. The next nearest neighbor hoppings are configured differently from the standard Haldane model, and as predicted by earlier theoretical studies, this gives rise to antichiral edge states that propagate in the same direction on opposite edges and co-exist with bulk states at the same frequency. Using pickup coils to measure the voltage distributions in the circuit, we experimentally verify the key features of the modified Haldane lattice, including the group velocities of the antichiral edge states.

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“…Antichiral edge states, in contrast to chiral edge states that transport along the opposite direction on two parallel boundaries, means one-way edge states transporting along the same direction on two parallel boundaries, which are realized in electrics (Colomés and Franz, 2018;Bhowmick and Sengupta, 2020) and photonics (Mandal et al, 2019). To overcome the limitation that the environment for achieving antichiral edge states must be low temperature in practical experiments in Mandal et al (2019), Chen et al realized antichiral edge states in a gyromagnetic PhC with a honeycomb lattice consisting of two interpenetrating triangular sublattices A and B that are immersed in opposite external magnetic fields, respectively, in 2020 (Chen et al, 2020).…”

Section: Antichiral Edge Statementioning

confidence: 99%

Magnetic-Optic Effect-Based Topological State: Realization and Application

et al. 2022

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The topological state in photonics was first realized based on the magnetic-optic (MO) effect and developed rapidly in recent years. This review summarizes various topological states. First, the conventional topological chiral edge states, which are accomplished in periodic and aperiodic systems based on the MO effect, are introduced. Some typical novel topological states, including valley-dependent edge states, helical edge states, antichiral edge states, and multimode edge states with large Chern numbers in two-dimensional and Weyl points three-dimensional spaces, have been introduced. The manifest point of these topological states is the wide range of applications in wave propagation and manipulation, to name a few, one-way waveguides, isolator, slow light, and nonreciprocal Goos–Hänchen shift. This review can bring comprehensive physical insights into the topological states based on the MO effect and provides reference mechanisms for light one-way transmission and light control.

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Antichiral edge states in Heisenberg ferromagnet on a honeycomb lattice

Cited by 49 publications

References 31 publications

Observation of Photonic Antichiral Edge States

Observation of Photonic Antichiral Edge States

Observation of Antichiral Edge States in a Circuit Lattice

Magnetic-Optic Effect-Based Topological State: Realization and Application

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