Pseudospins and topological effects of phonons in a Kekule lattice

Abstract

The search for exotic topological effects of phonons has attracted enormous interest for both fundamental science and practical applications. By studying phonons in a Kekulé lattice, we find a new type of pseudospins characterized by quantized Berry phases and pseudoangular momenta, which introduces various novel topological effects, including topologically protected pseudospin-polarized interface states and a phonon pseudospin Hall effect. We further demonstrate a pseudospin-contrasting optical selection rule and a pseudospin Zeeman effect, giving a complete generation-manipulation-detection paradigm of the phonon pseudospin. The pseudospin and topology-related physics revealed for phonons is general and applicable for electrons, photons and other particles.

5 pages, 4 figures, accepted by PRL

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Cited by in corpus (36)

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• Phonon Magnetic Moment from Electronic Topological Magnetization
• Chiral Phonons with Giant Magnetic Moments in a Topological Crystalline Insulator
• Kekule Lattice in Graphdiyne: Coexistence of Phononic and Electronic Higher-Order Band Topology
• Phononic real Chern insulator with protected corner modes in graphynes
• Elastic Valley Spin Controlled Chiral Coupling in Topological Valley Phononic Crystals
• Chiral phonons in honeycomb sublattice of layered CoSn-like compounds
• Symmetry-Enforced Nodal Chain Phonons
• Dynamical Floquet spectrum of Kekulé-distorted graphene under normal incidence of electromagnetic radiation
• Resonant transport in Kekule-distorted graphene nanoribbons
• Valley filtering effect of phonons in graphene with a grain boundary
• Intrinsic vibrational angular momentum from non-adiabatic effects in non-collinear magnetic molecules
• Absence of topological protection of the interface states in ${\mathbb{Z}}_2$ photonic crystals
• Copropagating edge states produced by the interaction between electrons and chiral phonons in two-dimensional materials
• Dynamical properties of magnetic topological insulator $T$Bi${}_2$Te${}_4$ ($T=$Mn, Fe): phonons dispersion, Raman active modes, and chiral phonons study
• From Elastic Spin to Phonon Spin: Symmetry and Fundamental Relations
• Topologically invisible defects in chiral mirror lattices
• Remote control of spin polarization of topological corner states
• Chiral phonons in binary compounds $A$Bi ($A$ = K, Rb, Cs) with P2${}_1$/c structure
• $T_3$Pb${}_{2}C{h}_2$ ($T$=Pd,Pt and $Ch$=S,Se) with transition metal kagome net: Dynamical properties, phonon nodal line, phonon surface states, and chiral phonons
• Multiple types of unconventional quasiparticles in the chiral crystal CsBe${}_2$F${}_5$
• Chiral Topological Phononic Quasiparticles in Enantiomeric Crystals SrSi${}_2$ and BaSi${}_2$
• Kekulé valence bond order in the honeycomb lattice optical Su-Schrieffer-Heeger Model and its relevance to Graphene
• Chiral magnon-polaron edge states in Heisenberg-Kitaev magnets
• Coexistent topological and chiral phonons in chiral RhGe: An ab initio study
• Physics of Phonons in Systems with Approximate Screw Symmetry
• Topological phases in discrete stochastic systems
• Canonical scattering problem in topological metamaterials: Valley-Hall modes through a bend
• Dynamical properties of quasiparticles in a tunable Kekulé graphene superlattice
• Emergence of Meron Kekulé lattices in twisted Néel antiferromagnets
• Spin separation and filtering assisted by topological corner states in the Kekulé lattice
• Phonon Weyl points and chiral edge modes with unconventional Fermi arcs in NbSi${}_2$
• Single $\pi$-flux hosting topological defect modes in bilayer acoustic metamaterials
• Floquet Control of Electron and Exciton Transport in Kekulé-Distorted Graphene
• Interplay of Kekulé distortions and laser fields in graphene
• Topological Weyl-like Phonons and Nodal Line Phonons in Graphene