Unconventional slowing down of electronic recovery in photoexcited charge-ordered La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$

Abstract

Ordered electronic phases are intimately related to emerging phenomena such as high Tc superconductivity and colossal magnetoresistance. The coupling of electronic charge with other degrees of freedom such as lattice and spin are of central interest in correlated systems. Their correlations have been intensively studied from femtosecond to picosecond time scales, while the dynamics of ordered electronic phases beyond nanoseconds are usually assumed to follow a trivia thermally driven recovery. Here, we report an unusual slowing down of the recovery of an electronic phase across a first-order phase transition, far beyond thermal relaxation time. Following optical excitation, the recovery time of both transient optical reflectivity and x-ray diffraction intensity from a charge-ordered superstructure in a La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$ thin film increases by orders of magnitude longer than the independently measured lattice cooling time when the sample temperature approaches the phase transition temperature. The combined experimental and theoretical investigations show that the slowing down of electronic recovery corresponds to the pseudo-critical dynamics that originates from magnetic interactions close to a weakly first-order phase transition. This extraordinary long electronic recovery time exemplifies an interplay of ordered electronic phases with magnetism beyond thermal processes in correlated systems.

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Cited by in corpus (13)

• Nonthermal pathways to ultrafast control in quantum materials
• Dynamical slowing down in an ultrafast photo-induced phase transition
• Critical Slowing Down at the Abrupt Mott Transition: When the First-Order Phase Transition Becomes Zeroth-Order and Looks Like Second-Order
• Dynamical criticality of spin-shear coupling in van der Waals antiferromagnets
• Influence of spin and orbital fluctuations on Mott-Hubbard exciton dynamics in LaVO${}_3$ Thin Films
• Direct Observation of Collective Modes of the Charge Density Wave in the Kagome Metal CsV${}_3$Sb${}_5$
• Transient quantum isolation and critical behavior in the magnetization dynamics of half-metallic manganites
• Superlattice-induced ferroelectricity in charge-ordered La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$
• Quasiparticle Relaxation Dynamics in URu${}_{2-x}$Fe${}_x$Si${}_2$ Single Crystals
• Scaling behavior of Charge order melting in Magnetic field-Pressure-Temperature space of 2.5% Al doped Pr${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• First-principle Study of Multiple Metastable Charge Ordering States in La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$
• Photoinduced Transient States of Antiferromagnetic Orderings in La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$ and SrFeO${}_3$ Thin Films Observed through Time-resolved Resonant Soft X-ray Scattering
• Tracking the local order parameter through the Hubbard exciton decoherence time in the Mott-Hubbard insulator LaVO3