Chiral phonons and pseudo-angular momentum in non-symmorphic systems

Abstract

Chiral phonons are the ones with nonzero polarization and can be observed only via a selective coupling with valley electrons and circularly polarized photons. In such process, a new physical quantity, i.e., pseudo-angular momentum (PAM), is required to meet the selection rule. However, phonon PAM was thought to be quantized and can be only defined in the symmorphic systems. In this work, we generalized the definition of PAM to three-dimensional non-symmorphic systems, which show distinct different properties compared with the one in symmorphic systems, e.g., PAM can be non-quantized and q-dependent but still be an observable quantity by experiments. Such new definitions and discoveries can help us to obtain chiral phonons in a broader class of systems with a nonzero group velocity and to convey information like chirality and angular momentum in solids as expected. Materials are also offered to understand the new definition and for further experimental detection.

7 pages, 4 figures and 1 table

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Cited by in corpus (38)

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• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Unified description of electronic orderings and cross correlations by complete multipole representation
• Chiral phonons: circularly polarized Raman spectroscopy and $\text{ab initio}$ calculations in a chiral crystal tellurium
• Weyl phonons in chiral crystals
• Chirality-induced Phonon-Spin Conversion at an Interface
• Magnetic order induced chiral phonons in a ferromagnetic Weyl semimetal
• Theory of Energy Dispersion of Chiral Phonon
• Observation of Phonon Angular Momentum
• Chiral-phonon-induced current in helical crystals
• Weyl Phonons: The connection of topology and chirality
• Conversion of chiral phonons into magnons in ferromagnets and antiferromagnets
• A comprehensive study of complex non-adiabatic exciton dynamics in MoSi${}_2$N${}_4$
• Understanding chiral charge-density wave by frozen chiral phonon
• Note on Angular Momentum of Phonons in Chiral Crystals
• Transverse Peierls Transition
• Theory of spin magnetization driven by chiral phonons
• Chiral phonons induced from spin dynamics via magnetoelastic anisotropy
• Extrinsic Mechanisms of Phonon Magnetic Moment
• Chiral phonons entangled with multiple Hall effects and unified convention for pseudoangular momentum in 2D materials
• Electron-Chiral Phonon Coupling, Crystal Angular Momentum, and Phonon Chirality
• Comprehensive Study of Phonon Chirality under Symmetry Constraints
• Chiral phonons in binary compounds $A$Bi ($A$ = K, Rb, Cs) with P2${}_1$/c structure
• Theory of spin Seebeck effect activated by acoustic chiral phonons
• Chiral magnon-polaron edge states in Heisenberg-Kitaev magnets
• Electrically Controllable Chiral Phonons in Ferroelectric Materials
• Anomalous circular phonon dichroism in transition metal dichalcogenides
• Coexistent topological and chiral phonons in chiral RhGe: An ab initio study
• Chiral excitations and the intermediate-field spin-liquid regime in the Kitaev magnet $\alpha$-RuCl${}_3$
• Description of molecular chirality and its analysis with high harmonic generation
• Physics of Phonons in Systems with Approximate Screw Symmetry
• Group Theory Analysis of Phonons in Monolayer Chromium Trihalides and Their Janus Structures
• Catalogue of chiral phonon materials
• Phonon pseudoangular momentum in $\alpha$-MoO${}_3$
• Chiral magnon in ferromagnetic chiral crystals
• General ab initio framework for electronic-order-induced lattice-dynamics symmetry breaking
• Dynamical Orbital Angular Momentum Induced by Circularly Polarized Phonons
• Raman spectroscopy of van der Waals topological magnet GdGaI