Anomalous circular phonon dichroism in transition metal dichalcogenides
arXiv:2301.00917 · doi:10.1103/PhysRevB.105.L121302
Abstract
A magnetic field can generally induce circular phonon dichroism based on the formation of Landau levels of electrons. Here, we study the magnetization-induced circular phonon dichroism in transition metal dichalcogenides, without forming Landau levels. We find that, instead of the conventional deformation potential coupling, pseudogauge-type electron-phonon coupling plays an essential role in the emergence of the phenomenon. As a concrete example, a large dichroism signal is obtained in monolayer MoTe2 on a EuO substrate, even without considering Rashba spin-orbit coupling. Due to the two-dimensional spin-valley-coupled band structure, MoTe2 shows a reciprocal and nonreciprocal absorption of circularly polarized acoustic phonons upon reversing the direction of phonon propagation and magnetization, respectively. By varying the gate voltage, a tunable circular phonon dichroism can be realized, which paves a way toward different physics and applications of two-dimensional acoustoelectronics.
arXiv comment6 pages,3 figures
References in corpus (41)
- Valley contrasting chiral phonons in monolayer hexagonal lattices
- Giant and tunable valley degeneracy splitting in MoTe2
- Limits on electron quality in suspended graphene due to flexural phonons
- Angular Momentum of Phonons and Einstein-de Haas Effect
- Flexural phonons in free-standing graphene
- Observation of a warped helical spin-texture in BiSe from circular dichroism angle-resolved photoemission spectroscopy
- Dynamical Multiferroicity
- Quantum Spin Hall Effect in Two-dimensional Crystals of Transition Metal Dichalcogenides
- Orbital magnetic moments of phonons
- Dichroic f-sum rule and the orbital magnetization of crystals
- Temperature-dependent resistivity of suspended graphene
- Entanglement of single-photons and chiral phonons in atomically thin WSe
- Double resonance Raman modes in mono- and few-layer MoTe
- Phonon Angular Momentum Induced by Temperature Gradient
- Local Berry curvature signatures in dichroic angle-resolved photoelectron spectroscopy
- Probing topology by "heating": Quantized circular dichroism in ultracold atoms
- Flexural mode of graphene on a substrate
- Superconductivity enhancement in the S-doped Weyl semimetal candidate MoTe2
- A Large Effective Phonon Magnetic Moment in a Dirac Semimetal
- Phonon Magnetochiral Effect
- Phono-magnetic analogs to opto-magnetic effects
- Phonon angular momentum Hall effect
- Elastic, electronic, bonding, and optical properties of WTe2 Weyl semimetal: A comparative investigation with MoTe2 from first principles
- Detecting fractional Chern insulators through circular dichroism
- Sub-picosecond photo-induced displacive phase transition in two-dimensional MoTe
- Observation of nonreciprocal magneto-optical scattering in nonencapsulated few-layered CrI3
- Chiral phonons and pseudo-angular momentum in non-symmorphic systems
- Quantization in chiral higher order topological insulators: circular dichroism and local Chern marker
- Circular phonon dichroism in Weyl semimetals
- Anomalous Hall effect in 2-phase transition-metal dichalcogenide monolayers on ferromagnetic substrates
- Phonon helicity induced by electronic Berry curvature in Dirac materials
- Strong magnetophonon oscillations in extra-large graphene
- Phonon rotoelectric effect
- Circular Dichroism and Radial Hall Effects in Topological Materials
- Circular dichroism of magneto-phonon resonance in doped graphene
- Phonon magnetochiral effect of band-geometric origin in Weyl semimetals
- Chiral valley phonons and flat phonon bands in moiré materials
- Hall Viscosity and the Acoustic Faraday Effect
- Electrical Control over Phonon Polarization in Strained Graphene
- Universal features of canonical phonon angular momentum without time-reversal symmetry
- Impact of novel electron-phonon coupling mechanisms on valley physics in two-dimensional materials