Inhomogeneous disordering at a photo-induced charge density wave transition

Abstract

Using ultrashort laser pulses, it has become possible to probe the dynamics of long-range order in solids on microscopic timescales. In the conventional description of symmetry-broken phases within time-dependent Ginzburg-Landau theory, the order parameter evolves coherently, with small fluctuations along an average trajectory. Recent experiments, however, indicate that some systems can support a different scenario, named ultrafast inhomogeneous disordering, where the average order parameter is no longer representative of the state on the atomic scale. Here we theoretically show that ultrafast disordering can occur in a minimal, yet paradigmatic, model for a Peierls instability if atomic scale inhomogeneities of both the electronic structure and the charge density wave order parameter are taken into account. The latter is achieved using a non-equilibrium generalization of statistical dynamical mean-field theory, coupled to stochastic differential equations for the order parameter.

13 pages, 7 figures

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• Picosecond volume expansion drives a later-time insulator-metal transition in a nano-textured Mott Insulator
• Dynamical Mean Field Theory extension to the nonequilibrium Two-Particle Self-Consistent approach
• Stochastic semiclassical theory for non-equilibrium electron-phonon coupled systems
• Quench dynamics in higher-dimensional Holstein models: Insights from Truncated Wigner Approaches
• Impact of disorder and phonons on the Hubbard bands of Mott insulators in strong electric fields
• Quantum Thermalization via Travelling Waves
• Nonequilibrium control of kagome metals
• Photoinduced melting dynamics and collective mode in a correlated charge-ordered system