Femtosecond "snapshots "of gap-forming charge-density-wave correlations in quasi-two-dimensional dichalcogenides 1T-TaS2 and 2H-TaSe2

Abstract

Time-resolved optical spectroscopy of collective and single-particle excitations of 1T-TaS2 and 2H-TaSe2 reveals the presence of a large gap in the excitation spectrum on the femtosecond timescale, associated with the formation of various degrees of CDW order. In common with superconducting cuprates, excitations with energies less than the full gap show much slower relaxation. This separation of timescales cannot be explained in a quasi-2D Fermi-Liquid picture with an anisotropic gap but rather suggests the formation of a fluctuating spatially inhomogeneous state eventually forming a long-range ordered state at low temperatures.

to appear in Phys. Rev.B Rapid Comm

Cited by in corpus (56)

• Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
• Nonthermal pathways to ultrafast control in quantum materials
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Pseudogap and charge density waves in two dimensions
• Momentum-dependent snapshots of a melting charge density wave
• Ultrafast melting of a charge-density wave in the Mott insulator 1T-TaS2
• One-Dimensional van der Waals Quantum Materials -- State of the Art and Perspectives
• Chiral charge-density-waves
• Dynamics of photoinduced Charge Density Wave-metal phase transition in K0.3MoO3
• Ultrafast manipulation of mirror domain walls in a charge density wave
• Ultrafast dynamics of coherent optical phonons and nonequilibrium electrons in transition metals
• Single-particle and collective mode couplings associated with 1- and 2-directional electronic ordering in metallic RTe${}_3$ (R = Ho, Dy, Tb)
• Disentanglement of the electronic and lattice parts of the order parameter in a 1D Charge Density Wave system probed by femtosecond spectroscopy
• Watching the birth of a charge density wave order: diffraction study on nanometer-and picosecond-scales
• Ultrafast dynamics of charge density waves in 4Hb-TaSe2 probed by femtosecond electron diffraction
• Unconventional charge density wave and photoinduced lattice symmetry change in Kagome Metal CsV${}_3$Sb${}_5$ probed by time-resolved spectroscopy
• Manipulation of Jeff=3/2 states by tuning the tetragonal distortion
• Optical freezing of charge motion in an organic conductor
• Polaronic conductivity in the photoinduced phase of 1T-TaS2
• Ultrafast electron calorimetry uncovers a new long-lived metastable state in 1T-TaSe${}_2$ mediated by mode-selective electron-phonon coupling
• Femtosecond core level photoemision spectroscopy on 1T-TaS2 using 60 eV laser source
• Coherent modulation of the electron temperature and electron-phonon couplings in a 2D material
• Ultrafast melting and recovery of collective order in the excitonic insulator Ta${}_2$NiSe${}_5$
• Revealing extremely low energy amplitude modes in the charge-density-wave compound LaAgSb${}_2$
• Nonequilibrium "melting" of a charge density wave insulator via an ultrafast laser pulse
• Ultrafast carrier localisation in the pseudogap state of cuprate superconductors from coherent quench experiments
• Revealing a new charge density wave order in TbTe${}_3$ by optical conductivity and ultrafast pump-probe experiments
• Coherent phonons and the interplay between charge density wave and Mott phases in 1$T$-TaSe${}_2$
• Snapshots of a light-induced metastable hidden phase driven by the collapse of charge order
• k-resolved susceptibility function of 2H-TaSe2 from angle-resolved photoemission
• Probing the coupling between a doublon excitation and the charge-density wave in TaS2 by ultrafast optical spectroscopy
• Ultrafast hot carrier dynamics of ZrTe${}_5$ from time-resolved optical reflectivity
• Quenching of phase coherence in quasi-one dimensional ring crystals
• Optical spectroscopy and ultrafast pump-probe study on Bi${}_2$Rh${}_3$Se${}_2$: evidence for charge-density-wave order formation
• Unconventional slowing down of electronic recovery in photoexcited charge-ordered La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$
• Doublon bottleneck in the ultrafast relaxation dynamics of hot electrons in 1T-TaS_2
• Nonlinear order parameter oscillations and lattice coupling in strongly-driven charge-density-wave systems
• Domain size effects on the dynamics of a charge density wave in 1T-TaS2
• Optical spectroscopy and ultrafast pump-probe study of structural phase transition in 1T'-TaTe2
• Coherent amplitudon generation in K_0.3MoO_3 through ultrafast inter-band quasi particle decay
• Spatially-resolved relaxation dynamics of photoinduced quasiparticles in underdoped YBa$sub2$Cu$sub3$O$sub7-delta$
• Phase-resolved frequency-domain analysis of the photoemission spectra for photoexcited 1T-TaS2 in the Mott insulating charge density wave state
• Ultrafast Control of Crystal Structure in a Topological Charge-Density-Wave Material
• Evolution of coherent collective modes through consecutive CDW transitions in (PO${}_2$)${}_4$(WO${}_3$)${}_{12}$ mono-phosphate tungsten bronze
• Time-domain study of coupled collective excitations in quantum materials
• Time-resolved reflectivity and Raman studies of the interplay of enigmatic orders in Mo${}_8$O${}_{23}$
• Highly anisotropic transient optical response of charge density wave order in ZrTe${}_3$
• Multichannel photodiode detector for ultrafast optical spectroscopy
• Anomalous amplitude mode dynamics below the expected charge-density-wave transition in 1$T$-VSe${}_2$
• Nonvolatile optical control of interlayer stacking order in 1T-TaS2
• Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
• Uncovering the nature of transient and metastable non-equilibrium phases in 1$T$-TaS${}_2$
• Properties and challenges of hot-phonon physics in metals: MgB${}_2$ and other compounds
• Dynamical control of Coulomb interactions and Hubbard bands in monolayer 1T-TaS${}_2$
• Giant Optomechanical Coupling in the Charge Density Wave State of Tantalum Disulfide
• Ultrafast Electronic Structure Engineering in 1$T$-TaS${}_2$: Role of Doping and Amplitude Mode Dynamics