Generating coherent phonon waves in narrow-band materials: a twisted bilayer graphene phaser
arXiv:2207.11245 · doi:10.1103/PhysRevLett.130.147001
Abstract
Twisted bilayer graphene (TBG) exhibits extremely low Fermi velocities for electrons, with the speed of sound surpassing the Fermi velocity. This regime enables the use of TBG for amplifying vibrational waves of the lattice through stimulated emission, following the same principles of operation of free-electron lasers. Our work proposes a lasing mechanism relying on the slow-electron bands to produce a coherent beam of acoustic phonons. We propose a device based on undulated electrons in TBG, which we dub the phaser. The device generates phonon beams in a terahertz (THz) frequency range, which can then be used to produce THz electromagnetic radiation. The ability to generate coherent phonons in solids breaks new ground in controlling quantum memories, probing quantum states, realizing non-equilibrium phases of matter, and designing new types of THz optical devices.
arXiv comment5 pages, 3 figures + supplementary material
References in corpus (69)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Moire bands in twisted double-layer graphene
- Dielectric function, screening, and plasmons in 2D graphene
- Phononics: Manipulating heat flow with electronic analogs and beyond
- Graphene Bilayers with a Twist
- An optically stimulated superconducting-like phase in K3C60 far above equilibrium Tc
- PT-Symmetric Phonon Laser
- Nonlinear phononics: A new ultrafast route to lattice control
- Origin of Mott insulating behavior and superconductivity in twisted bilayer graphene
- Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
- Phonon laser action in a tunable, two-level photonic molecule
- Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5
- Terahertz-Field-Induced Ferroelectricity in Quantum Paraelectric SrTiO
- Metastable ferroelectricity in optically strained
- An effective magnetic field from optically driven phonons
- Ultrafast reversal of the ferroelectric polarization
- Ground State and Hidden Symmetry of Magic Angle Graphene at Even Integer Filling
- Biaxial strain tuning of the optical properties of single-layer transition metal dichalcogenides
- Large Brillouin Amplification in Silicon
- Symmetry-based approach to electron-phonon interactions in graphene
- Theory of nonlinear phononics for coherent light-control of solids
- Light-driven ultrafast phonomagnetism
- Designing Flat Band by Strain
- Dynamical Multiferroicity
- Polarizing an antiferromagnet by optical engineering of the crystal field
- Transient superconductivity from electronic squeezing of optically pumped phonons
- Electron-Phonon Interactions and the Intrinsic Electrical Resistivity of Graphene
- Electronic spectrum of twisted graphene layers under heterostrain
- Dynamical Cooper pairing in non-equilibrium electron-phonon systems
- Orbital magnetic moments of phonons
- Ultrafast phononic switching of magnetization
- The theory of parametrically amplified electron-phonon superconductivity
- Temperature-dependent resistivity of suspended graphene
- Dissecting spin-phonon equilibration in ferrimagnetic insulators by ultrafast lattice excitation
- Hydrodynamic model for electron-hole plasma in graphene
- Phonon-derived ultrafast relaxation of spin-valley polarized states in MoS_{2}
- Phonon-limited resistivity of graphene by first-principle calculations: electron-phonon interactions, strain-induced gauge field and Boltzmann equation
- Nanoscale Strain Engineering of Giant Pseudo-Magnetic Fields, Valley Polarization and Topological Channels in Graphene
- Exceptional Points in Random-Defect Phonon Lasers
- Ultrafast Structure Switching through Nonlinear Phononics
- Moiré phonons in the twisted bilayer graphene
- Continuum model for relaxed twisted bilayer graphenes and moiré electron-phonon interaction
- Phonon driven Floquet matter
- Pressure tuning of light-induced superconductivity in K3C60
- Magnetophononics: ultrafast spin control through the lattice
- Global Phase Diagram of the Normal State of Twisted Bilayer Graphene
- Phono-magnetic analogs to opto-magnetic effects
- Strain Modulated Superlattices in Graphene
- Parametric amplification of optical phonons
- Pump frequency resonances for light-induced incipient superconductivity in YBaCuO
- Control of electron-electron interaction in graphene by proximity screening
- High-Temperature Atomic Superfluidity in Lattice Boson-Fermion Mixtures
- Synthetic electric fields and phonon damping in carbon nanotubes and graphene
- Cavity Optomechanics with Polariton Bose-Einstein Condensates
- Nanomechanical Analog of a Laser: Amplification of Mechanical Oscillations by Stimulated Zeeman Transitions
- Optically induced flat bands in twisted bilayer graphene
- Engineering Superfluidity in Bose-Fermi Mixtures of Ultracold Atoms
- Breaking Symmetry with Light: Ultra-Fast Ferroelectricity and Magnetism from Three-Phonon Coupling
- BCS theory of driven superconductivity
- Nonlinear Phononic Control and Emergent Magnetism in Mott Insulating Titanates
- Ultrafast reversal of the ferroelectric polarization by a midinfrared pulse
- Sum-frequency excitation of coherent magnons
- Carrier transport theory for twisted bilayer graphene in the metallic regime
- Phonon-mediated dimensional crossover in bilayer CrI3
- Nonlinear phononics in 2D SnTe: a ferroelectric material with phonon dynamical amplification of electric polarization
- Phonon lasing from optical frequency comb illumination of a trapped ion
- Tunable electron-phonon interactions in long-period superlattices
- Low-frequency and Moiré Floquet engineering: a review