Room temperature high frequency transport of Dirac fermions in epitaxially grown Sb_2Te_3 based topological insulators

Abstract

We report on the observation of photogalvanic effects in epitaxially grown Sb_2Te_3 three-dimensional (3D) topological insulators (TI). We show that asymmetric scattering of Dirac electrons driven back and forth by the terahertz electric field results in a dc electric current. Due to the "symmetry filtration" the dc current is generated in the surface electrons only and provides an opto-electronic access to probe the electric transport in TI, surface domains orientation and details of electron scattering even in 3D TI at room temperature where conventional surface electron transport is usually hindered by the high carrier density in the bulk.

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Cited by in corpus (54)

• Quantum nonlinear Hall effect induced by Berry curvature dipole in time-reversal invariant materials
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• High-frequency rectification via chiral Bloch electrons
• Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi
• Spatially dispersive circular photogalvanic effect in a Weyl semimetal
• Quantum frequency doubling in the topological insulator Bi2Se3
• Terahertz detection based on nonlinear Hall effect without magnetic field
• Enhanced photogalvanic current in topological insulators via Fermi energy tuning
• Photon Drag Effect in (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$ Three Dimensional Topological Insulators
• Helicity dependent photocurrent in electrically gated (Bi,Sb)_2Te_3 thin films
• Band resolved imaging of photocurrent in a topological insulator
• Shift charge and spin photocurrents in Dirac surface states of topological insulator
• Generation of Transient Photocurrents in the Topological Surface State of Sb${}_2$Te${}_3$ by Direct Optical Excitation with Mid-Infrared Pulses
• Highly tunable nonlinear Hall effects induced by spin-orbit couplings in strained polar transition-metal dichalcogenides
• Circular photon drag effect in bulk tellurium
• Spin Hall photoconductance in a 3D topological insulator at room temperature
• Infrared/Terahertz Spectra of the Photogalvanic Effect in (Bi,Sb)Te based Three Dimensional Topological Insulators
• Terahertz photogalvanics in twisted bilayer graphene close to the second magic angle
• Ultrafast Energy- and Momentum-resolved Surface Dirac Photocurrents in the Topological Insulator Sb${}_2$Te${}_3$
• Terahertz Photogalvanic Spectroscopy of Three Dimensional Topological Insulators
• Semiclassical theory of the circular photogalvanic effect in gyrotropic systems
• Universal Faraday rotation in HgTe wells with critical thickness
• Opto-Electronic Characterization of Three Dimensional Topological Insulators
• Terahertz electric field driven electric currents and ratchet effects in graphene
• High-frequency nonlinear transport and photogalvanic effects in two-dimensional topological insulators
• Edge photocurrent driven by THz electric field in bi-layer graphene
• Photocurrents in Bi2Se3: bulk versus surface, and injection versus shift currents
• Linear photogalvanic effect in surface states of topological insulators
• Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
• Circular photogalvanic effect in Cu/Bi bilayers
• Highly superlinear photogalvanic effects in (Bi${}_{0.3}$Sb${}_{0.7}$)${}_2$(Te${}_{0.1}$Se${}_{0.9}$)${}_3$: Probing 3D topological insulator surface states at room temperature
• Chemical Potential Fluctuations in Topological Insulator (Bi${}_{0.5}$Sb${}_{0.5}$)${}_2$Te${}_3$ Films Visualized by Photocurrent Spectroscopy
• Topological surface states in thick partially relaxed HgTe film
• Photocurrents in bulk tellurium
• Sign-alternating photoconductivity and magnetoresistance oscillations induced by terahertz radiation in HgTe quantum wells
• High frequency impact ionization and nonlinearity of photocurrent induced by intense terahertz radiation in HgTe-based quantum well structures
• Observation of terahertz second harmonic generation from Dirac surface states in the topological insulator Bi${}_2$Se${}_3$
• Nonlinear Absorption and Photocurrent in Weyl Semimetals
• Nonlinear optical absorption and photocurrents in topological insulators
• Raman Photogalvanic Effect: photocurrent at inelastic light scattering
• Ultrafast dynamics of photocurrents in surface states of 3D topological insulators
• Magnetic parity violation and parity-time-reversal-symmetric magnets
• Photocurrent measurements in topological insulator ${\text{Bi}}_2{\text{Se}}_3$ nanowires
• Terahertz radiation by subpicosecond spin-polarized photocurrent originating from Dirac electrons in a Rashba-type polar semiconductor
• THz Photodetector using sideband-modulated transport through surface states of a 3D Topological Insulator
• Cyclotron resonance induced photogalvanic effect in surface states of 200 nm thick strained HgTe films
• The impact of metallic contacts on spin-polarized photocurrents in topological insulator ${\text{Bi}}_2{\text{Se}}_3$ nanowires
• Terahertz spin ratchet effect in magnetic metamaterials
• Instantaneous Photon Drag Currents in Topological Insulators
• Reversible Engineering of Topological Insulator Surface State Conductivity through Optical Excitation
• Nonlinear bulk photocurrent probe Z2 topological phase transition
• Enhanced detection of circularly polarized photons with topological materials
• Local electric field induced spin photocurrent in ReS2
• General solution for the response of materials under radiation and tilted magnetic field: semi-classical regime