Photo-excited Carrier Dynamics and Impact Excitation Cascade in Graphene

Abstract

Photo-excitation in solids can trigger a cascade in which multiple particle-hole excitations are generated. We analyze the carrier multiplication cascade of impact excitation processes in graphene and show that the number of pair excitations has a strong dependence on doping, which makes carrier multiplication gate-tunable. We also predict that the number of excited pairs as well as the characteristic time of the cascade scale linearly with photo-excitation energy. These dependences, as well as sharply peaked angular distribution of pair excitations, provide clear experimental signatures of carrier multiplication.

References in corpus (22)

• High Efficiency Carrier Multiplication in PbSe Nanocrystals: Implications for Solar Energy
• Dielectric function, screening, and plasmons in 2D graphene
• Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
• Dirac cones reshaped by interaction effects in suspended graphene
• Ultrafast Optical-Pump Terahertz-Probe Spectroscopy of the Carrier Relaxation and Recombination Dynamics in Epitaxial Graphene
• Photo-excitation Cascade and Multiple Carrier Generation in Graphene
• Non-Fermi liquid behaviour of electrons in the half-filled honeycomb lattice (A renormalization group approach)
• First direct observation of Dirac fermions in graphite
• Ultrafast Photoluminescence from Graphene
• Electron-electron interactions and doping dependence of the two-phonon Raman intensity in graphene
• Photocurrent measurements of supercollision cooling in graphene
• Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene
• Carrier dynamics in epitaxial graphene close to the Dirac point
• Carrier Multiplication in Graphene
• Electronic Cooling in Graphene
• The Role of Electron-electron Interactions in Graphene ARPES Spectra
• Energy Relaxation of Hot Dirac Fermions in Graphene
• Slow imbalance relaxation and thermoelectric transport in graphene
• Electron-Hole Generation and Recombination Rates for Coulomb Scattering in Graphene
• Impact of Auger processes on carrier dynamics in graphene
• Inelastic carrier lifetime in graphene
• Relaxation of Optically Excited Carriers in Graphene

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• Photocurrent as a multi-physics diagnostic of quantum materials
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• Competing Ultrafast Energy Relaxation Pathways in Photoexcited Graphene
• Tunable Carrier Multiplication and Cooling in Graphene
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• Tuning Photoinduced Terahertz Conductivity in Monolayer Graphene: Optical Pump Terahertz Probe Spectroscopy
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• Ultrafast hot carrier dynamics of ZrTe${}_5$ from time-resolved optical reflectivity
• Quantum magnetooscillations in the ac conductivity of disordered graphene
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• Effect of anisotropic band curvature on carrier multiplication in graphene
• Relaxation of optically excited carriers in graphene: Anomalous diffusion and Lévy flights
• Nonlinear optical absorption and photocurrents in topological insulators
• Current amplification and relaxation in Dirac systems
• Collinear scattering of photoexcited carriers in graphene
• Real Space Raman Spectroscopy of Graphene Isotope Superlattices
• Chiral transport of hot carriers in graphene in the quantum Hall regime
• Polarized light emission from graphene induced by terahertz pulses
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• Introducing Corrections to the Reflectance of Graphene by Light Emission
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• Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
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