Observation of Floquet-Bloch states on the surface of a topological insulator

Abstract

The unique electronic properties of the surface electrons in a topological insulator are protected by time-reversal symmetry. Circularly polarized light naturally breaks time-reversal symmetry, which may lead to an exotic surface quantum Hall state. Using time- and angle-resolved photoemission spectroscopy, we show that an intense ultrashort mid-infrared pulse with energy below the bulk band gap hybridizes with the surface Dirac fermions of a topological insulator to form Floquet-Bloch bands. These photon dressed surface bands exhibit polarization-dependent band gaps at avoided crossings. Circularly polarized photons induce an additional gap at the Dirac point, which is a signature of broken time-reversal symmetry on the surface. These observations establish the Floquet-Bloch bands in solids and pave the way for optical manipulation of topological quantum states of matter.

23 pages including supplementary materials

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• Manipulating Femtosecond Spin--Orbit Torques with Laser Pulse Sequences to Control Magnetic Memory States and Ringing
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• Light-induced bound electron states in two-dimensional systems: Contribution to electron transport
• Noise Correlations in time- and angular-resolved photoemission spectroscopy
• Controllable photo-induced spin and valley filtering in silicene
• Temperature dependence of the topological phase transition of BiTeI from first principles
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• Prethermal quasiconserved observables in Floquet quantum systems
• Excitonic Bloch-Siegert shift in CsPbI3 perovskite quantum dots
• Floquet topological systems in the vicinity of band crossings: Reservoir induced coherence and steady-state entropy production
• Probing (topological) Floquet states through DC transport
• Behavior of Floquet Topological Quantum States in Optically Driven Semiconductors
• Quantum Hall effect in ac driven graphene: from half-integer to integer case
• Theory of x-ray scattering from laser-driven electronic systems
• Universal driving protocol for symmetry-protected Floquet topological phases
• Spectroscopic probes of isolated nonequilibrium quantum matter: Quantum quenches, Floquet states, and distribution functions
• Optically induced topological states on the surface of mercury telluride
• Optically tunable spin transport on the surface of a topological insulator
• Electric coupling in scanning SQUID measurements
• Quantum Emulation of Extreme Non-equilibrium Phenomena with Trapped Atoms
• Observation of chiral currents at the magnetic domain boundary of a topological insulator
• Control of Magnetic and Topological Orders with a DC Electric Field
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• Observation of Floquet band topology change in driven ultracold Fermi gases
• Photoinduced renormalization of Dirac states in BaNiS${}_2$
• Mapping light-dressed Floquet bands by highly nonlinear optical excitations and valley polarization
• Band nonlinearity-enabled manipulation of Dirac nodes, Weyl cones, and valleytronics with intense linearly polarized light
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• Ballistic transport through irradiated graphene
• Effect of Mn doping on ultrafast carrier dynamics in thin films of the topological insulator Bi2Se3
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• Sisyphus Thermalization of Photons in a Cavity-Coupled Double Quantum Dot
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• Many-body dynamics and gap opening in interacting periodically driven systems
• Floquet Weyl Magnons
• Time-resolved Hall conductivity of pulse-driven topological quantum systems
• Floquet engineering of the Luttinger Hamiltonian
• Anomalous Floquet tunneling in uniaxially strained graphene
• Keldysh approach to periodically driven systems with a fermionic bath: non-equilibrium steady state, proximity effect and dissipation
• Polarization as a tuning parameter for Floquet engineering: magnetism in the honeycomb, square, and triangular Mott insulators
• Floquet metal to insulator phase transitions in semiconductor nanowires
• Anomalous Josephson effect and rectification in junctions between Floquet topological superconductors
• Floquet topological phases coupled to environments and the induced photocurrent
• Floquet Spectrum and Two-Terminal Conductance of a Transition Metal Dichalcogenide Ribbon under a Circularly Polarized Laser Field
• Floquet spin states in OLEDs
• Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser
• Electronic transport in one-dimensional Floquet topological insulators via topological and nontopological edge states
• Fractionalized Prethermalization in a Driven Quantum Spin Liquid
• Signatures of information scrambling in the dynamics of the entanglement spectrum
• Statistical periodicity in driven quantum systems: General formalism and application to noisy Floquet topological chains
• Manipulating the symmetry of photon-dressed electronic states
• Topological defects in Floquet systems: Anomalous chiral modes and topological invariant
• Valley-Selective Topological Ordered States in Irradiated Bilayer Graphene
• Dynamical characterization of Weyl nodes in Floquet Weyl semimetal phases
• Anomalous Goos-Hänchen shift in the Floquet scattering of Dirac fermions
• First-principles modelling for time-resolved ARPES under different pump-probe conditions
• Floquet theory of spin dynamics under circularly polarized light pulses
• The Floquet Fermi Liquid
• Floquet superconductor in holography
• Robust edge states induced by electron-phonon interaction in graphene nanoribbons
• Geometric energy transport and refrigeration with driven quantum dots
• Theory of Time-Resolved Raman Scattering in Correlated Systems: Ultrafast Engineering of Spin Dynamics and Detection of Thermalization
• Dynamical competition between Quantum Hall and Quantum Spin Hall effects
• Interacting topological frequency converter
• Impact of ultrafast transport on the high-energy states of a photoexcited topological insulator
• Accessing electromagnetic properties of matter with cylindrical vector beams
• Nonequilibrium susceptibility in photoinduced Floquet states
• Topological edge state engineering with high-frequency electromagnetic radiation
• High-frequency Expansion for Floquet Prethermal Phases with Emergent Symmetries: Application to Time Crystals and Floquet Engineering
• Laser-induced topological $s$-wave superconductivity in bilayer transition metal dichalcogenides
• Cavity-induced charge transfer in periodic systems: length-gauge formalism
• Photoinduced Floquet topological magnons in Kitaev magnets
• Floquet topological transitions in extended Kane-Mele models with disorder
• Floquet Topological Semimetal with Nodal Helix
• Role of matrix elements in the time-resolved photoemission signal
• Optical imprinting of superlattices in two-dimensional materials
• Critical dynamics and phase transition of a strongly interacting warm spin-gas
• Observing photo-induced chiral edge states of graphene nanoribbons in pump-probe spectroscopies
• Entanglement spectrum and entropy in Floquet topological matter
• Impact of high-frequency pumping on anomalous finite-size effects in three-dimensional topological insulators
• Topological Quantum Walk with Discrete Time-Glide Symmetry
• Bandwidth-resonant Floquet states in honeycomb optical lattices
• Optical Activity from the Exciton Aharonov-Bohm Effect: A Floquet Engineering Approach
• Topological Floquet engineering of a 1D optical lattice via resonantly shaking with two harmonic frequencies
• Topological d-wave superconductivity in two dimensions
• Josephson-Current Signatures of Unpaired Floquet Majorana Bound States
• Quantum computing Floquet energy spectra
• Revealing the frequency-dependent oscillations in the nonlinear terahertz response induced by the Josephson current
• Observation of Floquet-induced gap in graphene
• Emergence of photo-induced multiple topological phases on square octagon lattice
• Emergent strong zero mode through local Floquet engineering
• Floquet topological transition by unpolarized light
• Floquet theory and computational method for the optical absorption of laser-dressed solids
• Nonequilibrium Electron Dynamics in a Solid with a Changing Nodal Excitation Gap
• Efficient computation of the $W_3$ topological invariant and application to Floquet-Bloch systems
• Topological Floquet states on a Möbius band irradiated by circularly polarised light
• Floquet theory of microwave absorption by an impurity in two dimensional electron gas
• From Dynamical Localization to Bunching in interacting Floquet Systems
• Dynamics of fluctuation correlation in periodically driven classical system
• Coherent Modulation of Quasiparticle Scattering Rates in a Photoexcited Charge-Density-Wave System
• Quantized Floquet topology with temporal noise
• Quasiperiodic disorder induced critical phases in a periodically driven dimerized $p$-wave Kitaev chain
• Multispectral time-resolved energy-momentum microscopy using high-harmonic extreme ultraviolet radiation
• Connecting active and passive $\mathcal{P}\mathcal{T}$-symmetric Floquet modulation models
• Inducing exceptional points, enhancing plasmon quality and creating correlated plasmon states with modulated Floquet parametric driving
• Phase transitions in intrinsic magnetic topological insulator with high-frequency pumping
• Emergent Haldane Model and Photon-Valley Locking in Chiral Cavities
• Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
• Transport signatures in topological systems coupled to AC fields
• Squeezed Josephson plasmons in driven YBa${}_2$Cu${}_3$O${}_{6+x}$
• Quantum phases of strongly-interacting bosons on a two-leg Haldane ladder
• Floquet engineering spin triplet states in unconventional magnets
• Floquet topological insulators: from band structure engineering to novel non-equilibrium quantum phenomena
• Floquet topological phase transitions in a kicked Haldane-Chern insulator
• Floquet Exceptional Topological Insulator
• Time evolution of Majorana corner modes in Floquet second-order topological superconductor
• Stimulated Rayleigh Scattering Enhanced by a Longitudinal Plasma Mode in a Periodically Driven Dirac Semimetal Cd${}_3$As${}_2$
• Electronic Floquet Liquid Crystals
• Periodic and aperiodic dynamics of flat bands in diamond-octagon lattice
• Floquet-engineered light-cone spreading of correlations in a driven quantum chain
• Stability of topologically protected edge states in nonlinear quantum walks: Additional bifurcations unique to Floquet systems
• Floquet optical selection rules in black phosphorus
• Dynamically enhanced unconventional superconducting correlations in a Hubbard ladder
• Floquet engineering of Dirac cones on the surface of a topological insulator
• Quantum noise detects Floquet topological phases
• Self-adapted Floquet Dynamics of Ultracold Bosons in a Cavity
• Generating many Majorana corner modes and multiple phase transitions in Floquet second-order topological superconductors
• Non-adiabatic bulk-surface oscillations in driven topological insulators
• Quantum Hall edge states under periodic driving: a Floquet induced chirality switch
• Photo-electrons unveil topological transitions in graphene-like systems
• Floquet Majorana fermions in driven hexagonal lattice systems
• Quantum phase transitions and cat states in cavity-coupled quantum dots
• Photoinduced spin-Hall resonance in a k^3-Rashba spin-orbit coupled two dimensional hole system
• Optically induced persistent current in carbon nanotubes
• Dynamical Fragile Topology in Floquet Crystals
• Transport signatures of symmetry protection in 1D Floquet topological insulators
• Room-temperature non-volatile optical manipulation of polar order in a charge density wave
• Floquet-Band Engineering of Shaken Bosonic Condensates
• Generating surface states in a Weyl semi-metal by applying electromagnetic radiation
• Edge states and phase diagram for graphene under polarized light
• Optically induced Kondo effect in semiconductor quantum wells
• Topological properties of a periodically driven Creutz ladder
• Efficient Prediction of Time- and Angle-Resolved Photoemission Spectroscopy Measurements on a Non-Equilibrium BCS Superconductor
• Fate of Topological Edge States in Disordered Periodically-driven Nonlinear Systems
• Terahertz chiral sub-wavelength cavities breaking time-reversal symmetry via ultra-strong light-matter interaction
• Driven Hofstadter Butterflies and Related Topological Invariants
• Multi-terminal Conductance at the Surface of a Weyl Semimetal
• Topologically trivial and nontrivial edge bands in graphene induced by irradiation
• Cooper instability generated by attractive fermion-fermion interaction in the two-dimensional semi-Dirac semimetals
• Quantum nonlinear phononics route towards nonequilibrium materials engineering: Melting dynamics of a ferrielectric charge density wave
• Cuprate superconductors: Dynamic stabilization?
• Ultrafast Control of Crystal Structure in a Topological Charge-Density-Wave Material
• Light-induced anomalous Hall conductivity in massive 3D Dirac semimetal Co${}_3$Sn${}_2$S${}_2$
• Interacting bosons in generalized zig-zag and railroad-trestle models
• Valley-controlled transport in graphene/ WSe${}_2$ heterostructures under an off-resonant polarized light
• Tunable interface states between Floquet-Weyl semimetals
• Three dimensional two-band Floquet topological insulator with $Z_2$ index
• Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps
• Dynamic Opening of a Gap in Dirac Surface States of the Thin-Film 3D Topological Insulator Bi2Se3 Driven by the Dynamic Rashba Effect
• Real-time simulation of light-driven spin chains on quantum computers
• Robust effective ground state in a nonintegrable Floquet quantum circuit
• Periodically driven interacting electrons in 1D: a many-body Floquet approach
• The Streda Formula for Floquet Systems: Topological Invariants and Quantized Anomalies from Cesaro Summation
• Control of superexchange interactions with DC electric fields
• Chiral Floquet Engineering on Topological Fermions in Chiral Crystals
• Controllable Finite-Momenta Dynamical Quasicondensation in the Periodically Driven One-Dimensional Fermi-Hubbard Model
• Direct observation of a photoinduced topological phase transition in Bi-doped (Pb,Sn)Se
• Direct and ultrafast probing of quantum many-body interaction and Mott-insulator transition through coherent two-dimensional spectroscopy
• Controllable Weyl Nodes and Fermi Arcs from Floquet Engineering Triple Fermions
• Fermionic analogue of black hole radiation with a super high Hawking temperature
• Symmetry-protected electronic metastability in an optically driven cuprate ladder
• Off-resonant light-induced topological phase transition and thermoelectric transport in semi-Dirac materials
• Interplay of Floquet Lifshitz transitions and topological transitions in bilayer Dirac materials
• Floquet Engineering of Multifold Fermions
• Effects of Floquet Engineering on the Coherent Exciton Dynamics in Monolayer WS${}_2$
• Relaxation timescales and electron-phonon coupling in optically-pumped YBa${}_2$Cu${}_3$O${}_{6+x}$ revealed by time-resolved Raman scattering
• Anomalous Floquet Phases. A resonance phenomena
• Light-induced ultrafast glide-mirror symmetry breaking in black phosphorus
• Time-domain study of coupled collective excitations in quantum materials
• Tuning of Bilayer Graphene Heterostructure by Horizontally Incident Circular Polarized Light
• One-dimensional time-Floquet photonic crystal
• Dephasing of Strong-Field-Driven Floquet States Revealed by Time- and Spectrum-Resolved Quantum-Path Interferometry
• Floquet-driven indirect exchange interaction mediated by topological insulator surface states
• Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets
• Localization length versus level repulsion in 1-D driven disordered quantum wires
• Microwave-induced conductance replicas in hybrid Josephson junctions without Floquet-Andreev states
• High harmonic generation light source with polarization selectivity and sub-100-$\mu$m beam size for time- and angle-resolved photoemission spectroscopy
• Floquet States
• Dynamical response of dissipative helical edge states
• Response of fermions in Chern bands to spatially local quenches
• Ultrafast control of spin-orbital separation probed with time-resolved RIXS
• Theory of Anomalous Floquet Higher-Order Topology: Classification, Characterization, and Bulk-Boundary Correspondence
• Real-time dynamics of the photoinduced topological state in organic conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$ under continuous-wave and pulse excitations
• Topological characterization of a non-Hermitian ladder via Floquet non-Bloch theory
• Spin texture of an irradiated warped topological insulator surface
• Generalized Linear Response Theory for Pumped Systems and its Application to Transient Optical Properties
• Floquet-Weyl and Floquet-topological-insulator phases in a stacked two-dimensional ring-network lattice
• Light controlled THz plasmonic time varying media: momentum gaps, entangled plasmon pairs, and pulse induced time reversal
• Quantum heat waves in a one-dimensional condensate
• Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets
• Four-dimensional Floquet topological insulator with an emergent second Chern number
• Anomalous thermoelectric properties of a Floquet topological insulator with spin momentum non-orthogonality
• Manipulating Z2 and Chern topological phases in a single material using periodically driving fields
• Photoinduced electronic and spin properties of two-dimensional electron gases with Rashba spin-orbit coupling under perpendicular magnetic fields
• Local and energy-resolved topological invariants for Floquet systems
• Relaxation dynamics of the optically driven nonequilibrium states in the electron- and hole-doped topological-insulator materials $(B{i}_{1-x}S{b}_x{)}_{2}T{e}_3$
• Semiconductor quantum well irradiated by a two-mode electromagnetic field as a terahertz emitter
• Quantum control of Hubbard excitons
• Instantaneous Photon Drag Currents in Topological Insulators
• Light-field dressing of transient photo-excited states above $E_F$
• Photo-induced spin and valley-dependent Seebeck effect in the low-buckled Dirac materials
• Floquet-Volkov interference in a semiconductor
• Multiple plateaus of high-sideband generation from Floquet matters
• Stabilization of prethermal Floquet steady states in a periodically driven dissipative Bose-Hubbard model
• Tailoring Metal Insulator Transitions $\&$ Band Topology via Off-resonant Periodic Drive in an Interacting Triangular Lattice
• Dynamical Quantum Phase Transitions in presence of a spin bath
• Prethermalization and wave condensation in a nonlinear disordered Floquet system
• Photon-Assisted Tunneling through Molecular Conduction Junctions with Graphene Electrodes
• Optically induced resonant tunneling of electrons in nanostructures
• TR-ARPES Signal in Pumped Semiconductors within Dynamical Projective Operatorial Approach (DPOA)
• Floquet engineering of the Lifshitz phase transition in the Hubbard model
• Floquet engineering the Hofstadter butterfly in the square lattice and its effective Hamiltonian
• Optical Conductivity Signatures of Floquet Electronic Phases
• Floquet Fractional Chern Insulators and Competing Phases in Twisted Bilayer Graphene
• Control of Yu-Shiba-Rusinov States through a Bosonic Mode
• Two-photon IR pumped UV-Vis transient absorption spectroscopy of Dirac fermions in the 2D and 3D topological insulator Bi2Se3
• Driven Non-Unitary Dynamics of Quantum Critical Systems
• Hybrid CO${}_2$-Ti:sapphire laser with tunable pulse duration for mid-infrared-pump terahertz-probe spectroscopy
• Photoinduced prethermalization phenomena in correlated metals
• Disorder induced topological phase transition in a driven Majorana chain
• Holographic Floquet states in low dimensions (I)
• In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator
• Nature of superconducting fluctuation in photo-excited systems
• Light-Induced Mirror Symmetry Breaking and Charge Transport
• Transport through vertical graphene contacts under intense laser fields
• Floquet engineering multi-channel Kondo physics
• Modulating dichroism and optical conductivity in bilayer graphene under intense electromagnetic field irradiation
• Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents
• Signature of edge states in resonant wave scattering
• Chiral TeraHertz surface plasmonics
• Floquet theory and applications in open quantum and classical systems
• Valley-dependent giant orbital moments and transport feature in rhombohedral graphene multilayers
• Predicting edge-localized monovacancy defects in zigzag graphene nanoribbons from Floquet quasienergy spectrum
• Interacting electrons in a flat-band system within the Generalized Kadanoff-Baym Ansatz
• Five-dimensional Floquet topological semimetals with emergent Yang monopoles and linked Weyl surfaces
• Modulation-induced long-range magnon bound states in one-dimensional optical lattices
• Floquet states in (LaNiO${}_3$)${}_2$/(LaAlO${}_3$)${}_N$ heterostructures grown along the (111) direction
• Ultra-fast electric field controlled spin-fluctuations in the Hubbard model
• Inducing anisotropies in Dirac fermions by periodic driving
• Spin bath dynamics and dynamical Renormalization Group
• Floquet Engineering of a Diatomic Molecule Through a Bichromatic Radiation Field
• Ultrafast photoinduced phase transition in the antiferromagnetic Dirac semimetal EuAgAs
• Time- and angle-resolved photoemission spectroscopy with wavelength-tunable pump and extreme ultraviolet probe enabled by twin synchronized amplifiers
• Topological transitions in two-dimensional Floquet superconductors
• Time-dependent potential impurity in topological insulator
• Floquet boundary states in AB-stacked graphite
• Ultra-critical Floquet Non-Fermi Liquid
• Dynamic melting and condensation of topological dislocation modes
• Topological hybrid semimetal phases and anomalous Hall effects in a three dimensional magnetic topological insulator
• Light-induced switch based on edge modes in irradiated thin topological insulators
• Direct driving of electronic and phononic degrees of freedom in a honeycomb bilayer with infrared light
• Photoinduced metallic Volkov-Pankratov states in semi-Dirac material
• Quantum geometry and geometric entanglement entropy of one-dimensional Floquet topological matter
• Coherent electron dynamics in monolayer ${\text{MoS}}_2$ under ultrashort optical pulse
• Dynamical recovery of SU(2) symmetry in the mass-quenched Hubbard model
• Schottky anomaly in a cavity-coupled double quantum well
• Photo-induced Floquet Weyl magnons in noncollinear antiferromagnets
• Floquet control of interactions and edge states in a programmable quantum simulator
• Photoprotected spin Hall effect on graphene with substrate induced Rashba spin-orbit coupling
• Resonant laser excitation and time-domain imaging of chiral topological polariton edge states
• A New Era of Quantum Materials Mastery and Quantum Simulators In and Out of Equilibrium
• Monolayer transition metal dichalcogenides under finite-pulse polarized radiation
• Visualization of optical polarization transfer to photoelectron spin vector emitted from the spin-orbit coupled surface state
• Optical conductivity of a topological system driven using a realistic pulse
• All-optical control of excitons in semiconductor quantum wells
• Dynamical characterization of $Z_2$ Floquet topological phases via quantum quenches
• Ultrafast electron dynamics at the Dirac node of the topological insulator Sb${}_2$Te${}_3$
• Computing Floquet quasienergies in finite and extended systems: Role of electromagnetic and quantum-geometric gauges
• Robust purely optical signatures of Floquet states in laser-dressed crystals
• Cavity-induced switching between Bell-state textures in a quantum dot
• High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source
• Time evolution of the local density of states of strongly correlated fermions coupled to a nanoprobe
• Floquet-Engineering Weyl Points and Linked Fermi Arcs from Straight Nodal Lines
• Stability of Floquet sidebands and quantum coherence in 1D strongly interacting spinless fermions
• Magnetic Order in Laser-Irradiated Kagome Antiferromagnets
• Optically Pumped Floquet States of Magnetization in Ferromagnets
• Engineering Floquet moiré patterns for scalable photocurrents
• Nonequilibrium topological spin textures in momentum space
• Simulating strong-field electron-hole dynamics in solids probed by attosecond transient absorption spectroscopy
• Electronic states bound by repulsive potentials in graphene irradiated by a circularly polarized electromagnetic field
• Photoinduced dc Hall current in few-layer black phosphorus with a gate-tunable Floquet gap
• Optical conductivity and orbital magnetization of Floquet vortex states
• Proposal for realizing anomalous Floquet insulators via Chern band annihilation
• Multiple Floquet Chern insulator phases in the spin-charge coupled triangular-lattice ferrimagnet: Crucial role of higher-order terms in the high-frequency expansion
• Properties of dissipative Floquet Majorana modes using a quantum dot
• Single-parameter spin-pumping in driven metallic rings with spin-orbit coupling
• Photo-induced Multiply Quantized Vortex States in Dirac-like Materials
• Dispersive nodal fermions along grain boundaries in Floquet topological crystals
• Ultrafast Coherent Bandgap Modulation Probed by Parametric Nonlinear Optics
• Unconventional quantum Hall effect in Floquet topological insulators
• The Symmetry Principle in Condensed Matter Physics (I)
• Photocurrent and photoconductance of an helical edge state
• Phonon state tomography of electron correlation dynamics in optically excited solids
• Extended Haldane Model in The Dice Lattice: Multiple Flat-Band-Induced topological Transitions Revealed
• Observation of an isolated flat band in the van der Waals crystal NbOCl${}_2$
• Interference-induced suppression of particle emission from a Bose-Einstein condensate in lattice with time-periodic modulations
• Dynamical Approach to Realize Room-Temperature Superconductivity in LaH${}_{10}$
• Photo-induced Non-collinear Interlayer RKKY Coupling in Bulk Rashba Semiconductors
• Floquet Gauge Pumps as Sensors for Spectral Degeneracies Protected by Symmetry or Topology
• Emergent Weyl-like points in periodically modulated systems
• Time-resolved ARPES and optical transport properties of irradiated twisted bilayer graphene in steady-state
• Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
• Charge qubits based on ultra-thin topological insulator films
• Theory of subcycle time-resolved photoemission: application to terahertz photodressing in graphene
• Discrete time crystals detected by time-translation twist
• A light-induced charge order mode in a metastable cuprate ladder
• Multiple tunable real-space degeneracies in graphene irradiated by twisted light
• Development of a versatile micro-focused angle-resolved photoemission spectroscopy system with Kirkpatrick-Baez mirror optics
• Bosonic Entanglement and Quantum Sensing from Energy Transfer in two-tone Floquet Systems
• Localized Floquet states in gated bilayer graphene induced by a focused optical beam with orbital angular momentum
• Low-frequency and Moiré Floquet engineering: a review
• Spin-dependent transport in a driven noncolinear antiferromagnetic fractal network
• Floquet Schrieffer-Wolff transform based on Sylvester equations
• Laser-Irradiated CrI${}_3$: When Chiral Photons Meet Topological Magnons
• Photo-induced nonlinear band shift and valence transition in SmS
• Laser-induced topological phases in monolayer amorphous carbon
• Decoding the drive-bath interplay: A guideline to enhance superconductivity
• Microscopic electron dynamics in nonlinear optical response of solids
• Floquet-Engineered Chern Insulator in two-dimensional $d_{x^2-y^2}$-Wave Altermagnets
• Topological energy pumping in a quasi-periodically driven four-level system
• Phase transition from Weyl to self-linked semimetal using bi-circular laser
• Adiabatic Green's function technique and the transient behavior in time-dependent fermion-boson coupled models
• Universal anyons at the irradiated surface of topological insulator
• Laser induced enhanced coupling between photons and squeezed magnons in antiferromagnets
• Non-Abelian statistics in light scattering processes across interacting Haldane chains
• Floquet topological systems with flat bands: Edge modes, Berry curvature, and Orbital magnetization
• Topical review on acousto-optical Floquet engineering of single-photon emitters
• $q$th-root non-Hermitian Floquet topological insulators
• Observations of 't Hooft's sublattices and Dirac's monopole by inhomogeneous phases of solitons
• Plasmon effects in photoemission
• Noise resilience of two-dimensional Floquet topological phases
• Floquet topological phases with high Chern numbers in a periodically driven extended Su-Schrieffer-Heeger model
• Time- and angle-resolved photoelectron spectroscopy of strong-field light-dressed solids: prevalence of the adiabatic band picture
• Terahertz light driven coherent excitation of a zone-folded Raman-active phonon mode in the Spin-Ladder System ${\alpha }^{\prime }$-NaV${}_2$O${}_5$
• Revealing non-Hermitian band structures of photonic Floquet media
• Nonequilibrium hysteretic phase transitions in periodically light-driven superconductors
• Floquet engineering with spatially non-uniform driving fields
• Chiral Instabilities in Driven-Dissipative Quantum Liquids
• Geometric Effects on Tunneling in Driven Quantum Systems
• Anomalous radiation reaction in a circularly polarized field
• Floquet engineering in the presence of optically excited carriers
• Research on topological materials using ultrafast spectroscopy
• Synthetic gauge field and pseudospin-orbit interaction in a stacked two-dimensional ring-network lattice
• Dynamical Symmetry Indicators for Floquet Crystals
• Elementary excitations in the hybrid Bose-Fermi system induced by circularly polarized light in a two-dimensional gas of charge carriers with different masses
• Optically induced delocalization of electrons bound by attractive potentials
• The mixing-spacetime symmetry in the Floquet-Bloch band theory
• Floquet spin textures in optically pumped non-Hermitian surface states
• Photo-induced directional transport in extended SSH chains
• Collective Magnetic Excitations in a Photo-excited Electron-doped Cuprate Superconductor
• Time-reversal invariant resonant backscattering on a topological insulator surface driven by a time-periodic gate voltage
• Projected branes as platforms for crystalline, superconducting, and higher-order topological phases
• Optical control of electrons in a Floquet topological insulator
• Density matrix analysis of systems influenced by periodic Hamiltonians
• Many-body correlations in Floquet steady-states: Frequency-resolved renormalization group of the driven Anderson impurity
• Interaction effects on electronic Floquet spectra: Excitonic effects
• Occupation Dynamics of Floquet-Volkov States and Spectral Sum Rule
• Dielectric Screening in Electromagnetic Dressing of Semiconductors
• Nonequilibrium Dynamics in a Quantum Spin Chain with Pump-Probe Resonant Inelastic X-ray Scattering
• Onsager Reciprocal Relations for Charge and Spin Transport in Periodically Driven Systems
• Excited-state band structure mapping
• Floquet engineering of topological phases protected by emergent symmetries under resonant drives
• $SU(N)$ spin-phonon simulations of Floquet dynamics in spin $S>1/2$ Mott insulators
• Volkov-Pankratov states in a driven semimetal for a generic interface