Domain-Wall Topology Induced by Spontaneous Symmetry Breaking in Polariton Graphene

Solnyshkov, D. D.; Leblanc, C.; Septembre, I.; Malpuech, Guillaume

doi:10.1103/physrevlett.129.066802

Cited by 7 publications

(4 citation statements)

References 69 publications

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“…Semenoff and co-workers suggested the realization of the soliton in a graphene heterojunction composed of two parts with different staggered potentials . More recently, implementations on the basis of polariton graphene and even on the basis of Kekulé-O graphene have been proposed. − The soliton has not yet been observed directly in graphene but in emulation experiments like photonic crystals , and acoustic resonator networks . Our paper goes beyond these works in the following way: The soliton arises due to a grain boundary between two regions of Kekulé-O distorted graphene and does not rely on differently modified bonds in the two regions (or on-site potentials).…”

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confidence: 86%

“…32 Semenoff and co-workers suggested the realization of the soliton in a graphene heterojunction composed of two parts with different staggered potentials. 33 More recently, implementations on the basis of polariton graphene 34 and even on the basis of Kekule-O graphene have been proposed. 35−38 The soliton has not yet been observed directly in graphene but in emulation experiments like photonic crystals 39,40 and acoustic resonator networks.…”

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confidence: 99%

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Atomically Thin Current Pathways in Graphene through Kekulé-O Engineering

García,

Betancur-Ocampo,

Sánchez-Ochoa

et al. 2024

Nano Lett.

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We demonstrate that the current flow in graphene can be guided on atomically thin current pathways by the engineering of Kekule-O distortions. A grain boundary in these distortions separates the system into topologically distinct regions and induces a ballistic domain-wall state. The state is independent of the orientation of the grain boundary with respect to the graphene sublattice and permits guiding the current on arbitrary paths. As the state is gapped, the current flow can be switched by electrostatic gates. Our findings are explained by a generalization of the Jackiw−Rebbi model, where the electrons behave in one region of the system as Fermions with an effective complex mass, making the device not only promising for technological applications but also a test-ground for concepts from high-energy physics. An atomic model supported by DFT calculations demonstrates that the system can be realized by decorating graphene with Ti atoms.

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confidence: 86%

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confidence: 99%

Atomically Thin Current Pathways in Graphene through Kekulé-O Engineering

García,

Betancur-Ocampo,

Sánchez-Ochoa

et al. 2024

Nano Lett.

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“…We compared the analytical calculation results with the numerical simulation results and find that they are in good agreement under the same model parameter settings. Our theoretical study can be used to guide the experimental study of the dynamic evolution of exciton polarization exciton BEC under coupled interaction as well as many fields such as quantum computing, quantum transport and quantum navigation [18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Dynamical evolution of exciton-polariton Bose–Einstein condensate under coupled interaction

Wang,

Liu,

Ren

et al. 2024

Phys. Scr.

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We studied the exciton-polariton Bose-Einstein condensation (BEC) under light ﬁeld manipulation by considering the coupled interaction of the system between exciton-polariton and light. Based on the coupled Gross-Pitaevskii equation (GPE) model and with modiﬁed variational method, we analytically derived the solutions of the excitonic system under the polar angle direction perturbation and system rotation. We identiﬁed that for diﬀerent rotational angular velocities and diﬀerent coupled strengths, the system evolves from a meta-stable oscillation state to monotonically decaying state, with potential for the study of quantum vortex identiﬁcation for such kind of coupled systems. Our theoretical results can be used to guide the study of the evolution mode of the exciton-polariton system involving coupled interaction.

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“…Despite the demonstration of various linear effects associated with structured band geometries, the interplay between the nonlinearities and geometrically rich band structures is still to be investigated. [ 57 , 58 , 59 ] From the point of view of applications, circularly polarized lasers have attracted a great attention in nanophotonics, [ 60 ] quantum optics, [ 61 , 62 ] and biophysics. [ 63 , 64 ] The reports on organic circularly polarized lasers mainly focus on organic chiral molecules [ 65 ] or helical microstructures.…”

Section: Introductionmentioning

confidence: 99%

Helical Polariton Lasing from Topological Valleys in an Organic Crystalline Microcavity

Long

Ren

et al. 2022

Advanced Science

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Topological photonics provides an important platform for the development of photonic devices with robust disorder‐immune light transport and controllable helicity. Mixing photons with excitons (or polaritons) gives rise to nontrivial polaritonic bands with chiral modes, allowing the manipulation of helical lasers in strongly coupled light‐matter systems. In this work, helical polariton lasing from topological valleys of an organic anisotropic microcrystalline cavity based on tailored local nontrivial band geometry is demonstrated. This polariton laser emits light of different helicity along different angular directions. The significantly enhanced chiral characteristics are achieved by the nonlinear relaxation process. Helical topological polariton lasers may provide a perfect platform for the exploration of novel topological phenomena that involve light‐matter interaction and the development of polariton‐based spintronic devices.

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Domain-Wall Topology Induced by Spontaneous Symmetry Breaking in Polariton Graphene

Cited by 7 publications

References 69 publications

Atomically Thin Current Pathways in Graphene through Kekulé-O Engineering

Atomically Thin Current Pathways in Graphene through Kekulé-O Engineering

Dynamical evolution of exciton-polariton Bose–Einstein condensate under coupled interaction

Helical Polariton Lasing from Topological Valleys in an Organic Crystalline Microcavity

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