Unconventional slowing down of electronic recovery in photoexcited charge-ordered La1/3Sr2/3FeO3

Yi Zhu, Jason Hoffman, Clare E. Rowland, Hyowon Park, Donald A. Walko, John W. Freeland, Philip J. Ryan, Richard D. Schaller, Anand Bhattacharya () and Haidan Wen ()
Additional contact information
Yi Zhu: Argonne National Laboratory
Jason Hoffman: Argonne National Laboratory
Clare E. Rowland: Argonne National Laboratory
Hyowon Park: Argonne National Laboratory
Donald A. Walko: Argonne National Laboratory
John W. Freeland: Argonne National Laboratory
Philip J. Ryan: Argonne National Laboratory
Richard D. Schaller: Argonne National Laboratory
Anand Bhattacharya: Argonne National Laboratory
Haidan Wen: Argonne National Laboratory

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract The coupling of ordered electronic phases with lattice, spin, and orbital degrees of freedom are of central interest in strongly correlated systems. Their interplay has been intensively studied from femtosecond to picosecond time scales, while their dynamics beyond nanoseconds are usually assumed to follow lattice cooling. Here, we report an unusual slowing down of the recovery of an electronic phase across a first-order phase transition. Following optical excitation, the recovery time of both transient optical reflectivity and X-ray diffraction intensity from the charge-ordered superstructure in a La1/3Sr2/3FeO3 thin film increases by orders of magnitude as the sample temperature approaches the phase transition temperature. In this regime, the recovery time becomes much longer than the lattice cooling time. The combined experimental and theoretical investigation shows 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.

Date: 2018
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DOI: 10.1038/s41467-018-04199-4

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