Strain-driven chiral phonons in two-dimensional hexagonal materials
arXiv:2201.04909 · doi:10.1103/PhysRevB.105.195431
Abstract
Hexagonal two-dimensional materials with broken inversion symmetry (as BN or transition metal dichalcodenides) are known to sustain chiral phonons with finite angular momentum, adding a further useful degree of freedom to the extraordinary entangled (electrical, optical, magnetic and mechanical) properties of these compounds. However, because of lattice symmetry constraints, such chiral modes are constrained to the corners of the Brillouin zone, allowing little freedom for manipulating the chiral features. In this work, we show how the application of uniaxial strain leads to the existence of new chiral modes in the vicinity of the zone center. We also show that such strain-induced chiral modes, unlike the ones pinned at the K points, can be efficiently manipulated by modifying the strain itself, which determines the position of these modes in the Brillouin Zone. The results of the present paper add a new technique for the engineering of the quantum properties of two-dimensional lattices.
6 Pages, 2 Figures, Supplementary: As ancillary file
References in corpus (10)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Two Dimensional Atomic Crystals
- Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
- Valley filter and valley valve in graphene
- Phonon and Raman scattering of two-dimensional transition metal dichalcogenides from monolayer, multilayer to bulk material
- Raman Signature and Phonon Dispersion of Atomically Thin Boron Nitride
- Chiral phonons in honeycomb sublattice of layered CoSn-like compounds
- Electrical Control over Phonon Polarization in Strained Graphene
- Universal features of canonical phonon angular momentum without time-reversal symmetry