Unusual Two-stage Dynamics of the Spin-Lattice Polaron Formation

Abstract

We follow the formation of a spin-lattice polaron after a quantum quench that simulates absorption of the pump{pulse in the time-resolved experiments. We discover a two-stage relaxation where spin and lattice degrees of freedom represent an integral part of the relaxation mechanism. In the first stage the kinetic energy of the spin-lattice polaron relaxes towards its ground state value while relaxation processes via spin and phonon degrees of freedom remain roughly independent. In the second, typically much longer stage, a subsequent energy transfer between lattice and spin degrees of freedom via the charge carrier emerges. The excess local spin energy radiates away via magnon excitations.

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• Real-time decay of a highly excited charge carrier in the one-dimensional Holstein model
• Ultra-fast photo-carrier relaxation in Mott insulators with short-range spin correlations
• Dynamics of screening in photo-doped Mott insulators
• Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective
• Non-thermal melting of Neel order in the Hubbard model
• Emergent ultrafast phenomena in correlated oxides and heterostructures
• Dynamical formation of a magnetic polaron in a two-dimensional quantum antiferromagnet
• Photo-induced nonequilibrium states in Mott insulators
• Thermalization after photoexcitation from the perspective of optical spectroscopy
• Transient terahertz photoconductivity of insulating cuprates
• Particle zoo in a doped spin chain: Correlated states of mesons and magnons
• Charge carrier relaxation dynamics in the one-dimensional Kondo lattice model