Slow noncollinear Coulomb scattering in the vicinity of the Dirac point in graphene
arXiv:1805.01761 · doi:10.1103/PhysRevLett.117.087401
Abstract
The Coulomb scattering dynamics in graphene in energetic proximity to the Dirac point is investigated by polarization resolved pump-probe spectroscopy and microscopic theory. Collinear Coulomb scattering rapidly thermalizes the carrier distribution in k-directions pointing radially away from the Dirac point. Our study reveals, however, that in almost intrinsic graphene full thermalization in all directions relying on noncollinear scattering is much slower. For low photon energies, carrier-optical-phonon processes are strongly suppressed and Coulomb mediated noncollinear scattering is remarkably slow, namely on a ps timescale. This effect is very promising for infrared and THz devices based on hot carrier effects.
References in corpus (26)
- 30 inch Roll-Based Production of High-Quality Graphene Films for Flexible Transparent Electrodes
- Measurement of Ultrafast Carrier Dynamics in Epitaxial Graphene
- Approaching the Dirac point in high mobility multi-layer epitaxial graphene
- Photo-excitation Cascade and Multiple Carrier Generation in Graphene
- Snapshots of non-equilibrium Dirac carrier distributions in graphene
- First direct observation of a nearly ideal graphene band structure
- Direct view on the ultrafast carrier dynamics in graphene
- Carrier dynamics in epitaxial graphene close to the Dirac point
- Generation of photovoltage in graphene on a femtosecond time scale through efficient carrier heating
- Non-equilibrium dynamics of photo-excited electrons in graphene: collinear scattering, Auger processes, and the impact of screening
- Photo-thermoelectric and photoelectric contributions to light detection in metal-graphene-metal photodetectors
- Antenna enhanced graphene THz emitter and detector
- Tracking primary thermalization events in graphene with photoemission at extreme timescales
- Competing Ultrafast Energy Relaxation Pathways in Photoexcited Graphene
- Photo-excited Carrier Dynamics and Impact Excitation Cascade in Graphene
- Anisotropy of excitation and relaxation of photogenerated Dirac electrons in graphene
- Hot-carrier photocurrent effects at graphene-metal interfaces
- Ultrafast pseudospin dynamics in graphene
- Microscopic description of intraband absorption in graphene: the occurrence of transient negative differential transmission
- Dynamics of photoexcited carriers in graphene
- Electron-phonon cooling in large monolayer graphene devices
- Impact of doping on the carrier dynamics in graphene
- Electronic Cooling via Interlayer Coulomb Coupling in Multilayer Epitaxial Graphene
- Anisotropic photoconductivity in graphene
- Polarization dependence of photocurrent in a metal-graphene-metal device
- Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene
Cited by in corpus (28)
- Hot carriers in graphene -- fundamentals and applications
- The ultrafast dynamics and conductivity of photoexcited graphene at different Fermi energies
- Decoding the ultrafast formation of a Fermi-Dirac distributed electron gas
- Second harmonic generation in graphene dressed by a strong terahertz field
- Optical emission of graphene and electron-hole pair production induced by a strong THz field
- Theory of photoexcited and thermionic emission across a two-dimensional graphene-semiconductor Schottky junction
- Ultrafast Momentum Imaging of Pseudospin-Flip Excitations in Graphene
- Bypassing the structural bottleneck in the ultrafast melting of electronic order
- Photocarrier thermalization bottleneck in graphene
- Phonon-driven ultrafast symmetry lowering in a BiSe crystal
- Polarized photoluminescence clocks ultrafast pseudospin relaxation in graphene
- Thermalization of photoexcited carriers in two-dimensional transition metal dichalcogenides and internal quantum efficiency of van der Waals heterostructures
- Nonlinear optical absorption and photocurrents in topological insulators
- Symmetry-breaking supercollisions in Landau-quantized graphene
- Collinear scattering of photoexcited carriers in graphene
- Fate of electron beam in graphene: Coulomb relaxation or plasma instability?
- Anisotropic ultrafast optical response of terahertz pumped graphene
- Polarized light emission from graphene induced by terahertz pulses
- Momentum-space Observation of Optically Excited Non-Thermal Electrons in Graphene with Persistent Pseudospin Polarization
- Unconventional double-bended saturation of optical transmission in graphene due to many-particle interactions
- Pump-induced terahertz anisotropy in bilayer graphene
- Photoexcitation Cascade and Quantum-Relativistic Jets in Graphene
- Polariton transport in 2D semiconductors: Phonon-mediated transitions between ballistic, superdiffusive and exciton-limited regimes
- Highly efficient broadband THz upconversion with Dirac materials
- Polarization and driving force analysis of coherent optical shear phonons in graphite
- Phonon-assisted carrier cooling in h-BN/graphene van der Waals heterostructures
- Giant intrinsic photoresponse in pristine graphene
- Terahertz electro-optic effect in BiSe crystals