Edge currents driven by terahertz radiation in graphene in quantum Hall regime

Abstract

We observe that the illumination of unbiased graphene in the quantum Hall regime with polarized terahertz laser radiation results in a direct edge current. This photocurrent is caused by an imbalance of persistent edge currents, which are driven out of thermal equilibrium by indirect transitions within the chiral edge channel. The direction of the edge photocurrent is determined by the polarity of the external magnetic field, while its magnitude depends on the radiation polarization. The microscopic theory developed in this paper describes well the experimental data.

References in corpus (29)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Topological Insulators
• Topological insulators and superconductors
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Boron nitride substrates for high-quality graphene electronics
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Room-Temperature Quantum Hall Effect in Graphene
• SiC Graphene Suitable For Quantum Hall Resistance Metrology
• Quantum Resistance Standard Based on Epitaxial Graphene
• High frequency electric field induced nonlinear effects in graphene (review)
• Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene
• Tunable symmetry breaking and helical edge transport in a graphene quantum spin Hall state
• Non-Equilibrium Edge Channel Spectroscopy in the Integer Quantum Hall Regime
• Terahertz radiation driven chiral edge currents in graphene
• Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO${}_2$-laser
• Ballistic transport in graphene antidot lattices
• Magneto-Gyrotropic Photogalvanic Effects in Semiconductor Quantum Wells
• Charge and Spin Transport at the Quantum Hall Edge of Graphene
• Theory of resonant photon drag in monolayer graphene
• Spin relaxation times of 2D holes from spin sensitive bleaching of inter-subband absorption
• Tuning of structure inversion asymmetry by the $\delta$-doping position in (001)-grown GaAs quantum wells
• Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures
• Direct current driven by ac electric field in quantum wells
• Terahertz electric field driven electric currents and ratchet effects in graphene
• Magnetic ratchet effect in bilayer graphene
• Orbital mechanism of the circular photogalvanic effect in quantum wells
• Cyclotron resonance of the magnetic ratchet effect and second harmonic generation in bilayer graphene
• Transport of Massless Dirac Fermions in Non-topological Type Edge States
• Negative dynamic Drude conductivity in pumped graphene

Cited by in corpus (6)

• Terahertz photogalvanics in twisted bilayer graphene close to the second magic angle
• Edge photocurrent driven by THz electric field in bi-layer graphene
• Edge photogalvanic effect caused by optical alignment of carrier momenta in 2D Dirac materials
• Nonlinear intensity dependence of terahertz edge photocurrents in graphene
• Edge photocurrent in bilayer graphene due to inter-Landau-level transitions
• Strong photoresponse of edge two-dimensional electrons in a magnetic field