Doublon bottleneck in the ultrafast relaxation dynamics of hot electrons in 1T-TaS_2

Abstract

Employing time-resolved photoelectron spectroscopy we analyze the relaxation dynamics of hot electrons in the charge density wave / Mott material 1T-TaS_2. At 1.2 eV above the Fermi level we observe a hot electron lifetime of 12 +- 5 fs in the metallic state and of 60 +- 10 fs in the broken symmetry ground state - a direct consequence of the reduced phase space for electron-electron scattering determined by the Mott gap. Boltzmann equation calculations which account for the interaction of hot electrons in a Bloch band with a doublon-holon excitation in the Mott state provide insight into the unoccupied electronic structure in the correlated state.

arXiv comment6 pages, 3 figures

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Cited by in corpus (11)

• Doublon-like excitations and their phononic coupling in a Mott charge-density-wave system
• Phase-resolved frequency-domain analysis of the photoemission spectra for photoexcited 1T-TaS2 in the Mott insulating charge density wave state
• Environment-induced decay dynamics of anti-ferromagnetic order in Mott-Hubbard systems
• Hierarchy of double-time correlations
• Magnetic Doublon Bound States in the Kondo Lattice Model
• Quasi-particle propagation across semiconductor-Mott insulator interfaces
• Attraction versus repulsion between doublons or holons in Mott-Hubbard systems
• Bound States at Semiconductor -- Mott Insulator Interfaces
• Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
• Topical review: the nature of the ground state and possibility of a quantum spin liquid in 1T metal dichalcogenides
• Transmission through multiple Mott insulator - semiconductor wells