Light-induced shear phonon splitting and instability in bilayer graphene

Abstract

Coherent engineering of landscape potential in crystalline materials is a rapidly evolving research field. Ultrafast optical pulses can manipulate low-frequency shear phonons in van der Waals layered materials through the dynamical dressing of electronic structure and photoexcited carrier density. In this work, we provide a diagrammatic formalism for nonlinear Raman force and implement it to shear phonon dynamics in bilayer graphene. We predict a controllable splitting of double degenerate shear phonon modes due to light-induced phonon mixing and renormalization according to a coherent nonlinear Raman force mechanism. Intriguingly, we obtain a light-induced shear phonon softening that facilitates structural instability at a critical field amplitude for which the shear phonon frequency vanishes. The phonon splitting and instability strongly depend on the laser intensity, frequency, chemical potential, and temperature of photoexcited electrons. This study motivates future experimental investigation of the optical fine-tuning and regulation of shear phonons and layer stacking order in layered van der Waals mater

arXiv comment17 pages and 4 figures

References in corpus (41)

• Raman spectroscopy as a versatile tool for studying the properties of graphene
• Landau level degeneracy and quantum Hall effect in a graphite bilayer
• Electron-phonon interactions from first principles
• Photovoltaic Hall effect in graphene
• The electronic properties of bilayer graphene
• Stacking-engineered ferroelectricity in bilayer boron nitride
• Nonequilibrium dynamical mean-field theory and its applications
• Interfacial Ferroelectricity by van-der-Waals Sliding
• The Shear Mode of Multi-Layer Graphene
• Interlayer breathing and shear modes in few-trilayer MoS2 and WSe2
• Inelastic Light Scattering From Correlated Electrons
• Ultrafast collinear scattering and carrier multiplication in graphene
• Nonthermal pathways to ultrafast control in quantum materials
• Shear and Layer Breathing Modes in Multilayer MoS2
• Ultrafast Photoluminescence from Graphene
• Metastable ferroelectricity in optically strained $SrTi{O}_3$
• Charge-polarized interfacial superlattices in marginally twisted hexagonal boron nitride
• Non-equilibrium dynamics of photo-excited electrons in graphene: collinear scattering, Auger processes, and the impact of screening
• Low-Frequency Raman Modes and Electronic Excitations In Atomically Thin MoS2 Crystals
• The ultrafast dynamics and conductivity of photoexcited graphene at different Fermi energies
• Ultrafast Electron-Phonon Decoupling in Graphite
• Coherent control of a structural phase transition in a solid-state surface system
• Ultrafast Dynamics of Massive Dirac Fermions in Bilayer Graphene
• Light-Driven Raman Coherence as a Non-Thermal Route to Ultrafast Topology Switching
• Effective Hamiltonians for fastly driven many-body lattice systems
• Light induced sub-picosecond topological phase transition in MoTe2
• Calculation of the Raman G peak intensity in monolayer graphene: role of Ward identities
• Mode-resolved reciprocal space mapping of electron-phonon interaction in the Weyl semimetal candidate Td-WTe${}_2$
• Interaction quench in the Holstein model: Thermalization crossover from electron- to phonon-dominated relaxation
• In-plane critical magnetic fields in magic-angle twisted trilayer graphene
• Theory of rigid-plane phonon modes in layered crystals
• Transient trapping into metastable states in systems with competing orders
• Self-similar dynamics of order parameter fluctuations in pump-probe experiments
• Shear and breathing modes of layered materials
• Ultrafast dynamics of the low frequency shear mode in $1{\mathrm{T}}^{\prime }-\mathrm{MoT}{\mathrm{e}}_2$
• Gauge invariance and Ward identities in nonlinear response theory
• Hopping-resolved electron-phonon coupling in bilayer graphene
• Electronic structure and layer-resolved transmission of bilayer graphene nanoribbon in the presence of vertical fields
• Transient Hot Electron Dynamics in Single-Layer TaS${}_2$
• Ultrafast broadband optical spectroscopy for quantifying subpicometric coherent atomic displacements in $WT{e}_2$
• Giant Shear Displacement by Light-Induced Raman Force in Bilayer Graphene