Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates

Abstract

One of the pivotal questions in the physics of high-temperature superconductors is whether the low-energy dynamics of the charge carriers is mediated by bosons with a characteristic timescale. This issue has remained elusive since electronic correlations are expected to dramatically speed up the electron-boson scattering processes, confining them to the very femtosecond timescale that is hard to access even with state-of-the-art ultrafast techniques. Here we simultaneously push the time resolution and the frequency range of transient reflectivity measurements up to an unprecedented level that enables us to directly observe the 16 fs build-up of the effective electron-boson interaction in hole-doped copper oxides. This extremely fast timescale is in agreement with numerical calculations based on the t-J model and the repulsive Hubbard model, in which the relaxation of the photo-excited charges is achieved via inelastic scattering with short-range antiferromagnetic excitations.

to appear in Nature Physics

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• Theory for Time-Resolved Resonant Inelastic X-ray Scattering
• Finite-temperature density-matrix renormalization group method for electron-phonon systems: Thermodynamics and Holstein-polaron spectral functions
• Emergent ultrafast phenomena in correlated oxides and heterostructures
• Nonequilibrium steady-state theory of photodoped Mott insulators
• Photo-induced nonequilibrium states in Mott insulators
• Establishing non-thermal regimes in pump-probe electron-relaxation dynamics
• Phonon-assisted processes in the ultraviolet transient optical response of graphene
• Investigation of the Non-equilibrium State of Strongly Correlated Materials by Complementary Ultrafast Spectroscopy Techniques
• Disorder-sensitive pump-probe measurements on Nd${}_{1.83}$Ce${}_{0.17}$CuO${}_{4\pm \delta }$ films
• Complete many-body localization in the t-J model caused by random magnetic field
• Fractons from frustration in hole-doped antiferromagnets
• Nature of Bosonic Excitations revealed by high-energy charge carriers
• Nonequilibrium phononic first-order phase transition in a driven fermion chain
• Unusual Low-Energy Collective Charge Excitations in High-$T_c$ Cuprate Superconductors
• Coupled electronic and magnetic excitations in the cuprates and their role in the superconducting transition
• The Future of the Correlated Electron Problem
• Selective coupling of coherent optical phonons in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ with electronic transitions
• Time-resolved X-ray Spectroscopy from the Atomic Orbital Ground State Up
• Anomalous amplitude mode dynamics below the expected charge-density-wave transition in 1$T$-VSe${}_2$
• Properties and challenges of hot-phonon physics in metals: MgB${}_2$ and other compounds
• Charge carrier relaxation dynamics in the one-dimensional Kondo lattice model
• Dynamics of superconducting pairs in the two-dimensional Hubbard model
• Ultrafast Raman probe of the photoinduced superconducting to normal state transition in the cuprate Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$