Polaronic conductivity in the photoinduced phase of 1T-TaS2

Abstract

The transient optical conductivity of photoexcited 1T-TaS2 is determined over a three-order-of-magnitude frequency range. Prompt collapse and recovery of the Mott gap is observed. However, we find important differences between this transient metallic state and that seen across the thermally-driven insulator-metal transition. Suppressed low-frequency conductivity, Fano phonon lineshapes, and a mid-infrared absorption band point to polaronic transport. This is explained by noting that the photo-induced metallic state of 1T-TaS2 is one in which the Mott gap is melted but the lattice retains its low-temperature symmetry, a regime only accessible by photo-doping.

10 pages, 4 figures

References in corpus (2)

• Photoinduced Fano-resonance of coherent phonons in zinc
• Signatures of polaronic charge ordering in optical and dc conductivity using dynamical mean field theory

Cited by in corpus (30)

• Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
• Momentum-dependent snapshots of a melting charge density wave
• Thermalization of a pump-excited Mott insulator
• Cavity-mediated thermal control of metal-to-insulator transition in 1T-TaS${}_2$
• Ultrafast doublon dynamics in photo-excited 1T-TaS${}_2$
• Fe-doping induced superconductivity in charge-density-wave system 1T-TaS2
• Ultrafast jamming of electrons into an amorphous entangled state
• Real-time decay of a highly excited charge carrier in the one-dimensional Holstein model
• Deconstructing the Hubbard Hamiltonian by Ultrafast Quantum Modulation Spectroscopy in Solid-state Mott Insulators
• Photoexcitation Induced Quantum Dynamics of Charge Density Wave and Emergence of a Collective Mode in 1T-TaS${}_2$
• Quantum Monte Carlo in the steady-state
• Nonequilibrium "melting" of a charge density wave insulator via an ultrafast laser pulse
• Photoinduced in-gap excitations in the one-dimensional extended Hubbard model
• Snapshots of a light-induced metastable hidden phase driven by the collapse of charge order
• Coexistence of excited polarons and metastable delocalized states in photo-induced metals
• Probing the coupling between a doublon excitation and the charge-density wave in TaS2 by ultrafast optical spectroscopy
• A dynamical stability limit for the charge density wave in K0.3MoO3
• Phase-channel dynamics reveal the role of impurities and screening in a quasi-one-dimensional charge-density wave system
• Lattice and surface effects in the out-of-equilibrium dynamics of the Hubbard model
• Doublon-like excitations and their phononic coupling in a Mott charge-density-wave system
• Scattering dominated high-temperature phase of 1T-TiSe2: an optical conductivity study
• Structural and Magnetic Characterization of Large Area, Free-Standing Thin Films of Magnetic Ion Intercalated Dichalcogenides Mn0.25TaS2 and Fe0.25TaS2
• Thermal Purcell effect and cavity-induced renormalization of dissipations
• Interlayer Hopping between Surface Mott Insulator and Bulk Band Insulator in layered 1T-TaS_{2}
• Pump-induced terahertz conductivity response and peculiar bound state in Mn3Si2Te6
• Interlayer charge transfer induced by electronic instabilities in the natural van der Waals hetrostructure 4H${}_b$-TaS${}_2$
• Multimode vibrational coupling across the insulator-to-metal transition in 1T-TaS${}_2$ in THz cavities
• Giant Optomechanical Coupling in the Charge Density Wave State of Tantalum Disulfide
• Properties and challenges of hot-phonon physics in metals: MgB${}_2$ and other compounds
• Ultrafast Electronic Structure Engineering in 1$T$-TaS${}_2$: Role of Doping and Amplitude Mode Dynamics