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; Haidan Wen

doi:10.1038/s41467-018-04199-4

Unconventional slowing down of electronic recovery in photoexcited charge-ordered La_1/3Sr_2/3FeO₃

Yi Zhu, Jason Hoffman, Clare E. Rowland, Hyowon Park, Donald A. Walko, John W. Freeland, Philip J. Ryan, Richard D. Schaller, Anand Bhattacharya^*, Haidan Wen

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

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 La_1/3Sr_2/3FeO₃ 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.

Original language	English (US)
Article number	1799
Journal	Nature communications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41467-018-04199-4
State	Published - Dec 1 2018

Funding

We acknowledge G. Doumy and A. M. March for the assistance of using the high-repetition rate laser at APS beamline 7ID-C.Y.Z., J.H., A.B., and H.W. acknowledge support of U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), Materials Sciences and Engineering Division. H.P. acknowledges support of the start-up funding from the University of Illinois at Chicago and Argonne National Laboratory (by the U.S. Department of Energy, Office of Science program) and the computing resources provided on Blues, a high-performance computing cluster operated by the Laboratory Computing Resource Center at Argonne National Laboratory. H.W. and J.F. acknowledge the support of data analysis by DOE-BES grant No. DE-SC0012375. The use of the Advanced Photon Source and Center for Nanoscale Materials is supported by DOE-BES, under Contract No. DE-AC02-06CH11357.

ASJC Scopus subject areas

General Physics and Astronomy
General Chemistry
General Biochemistry, Genetics and Molecular Biology

Access to Document

10.1038/s41467-018-04199-4

Cite this

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

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.",

author = "Yi Zhu and Jason Hoffman and Rowland, {Clare E.} and Hyowon Park and Walko, {Donald A.} and Freeland, {John W.} and Ryan, {Philip J.} and Schaller, {Richard D.} and Anand Bhattacharya and Haidan Wen",

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AU - Zhu, Yi

AU - Hoffman, Jason

AU - Rowland, Clare E.

AU - Park, Hyowon

AU - Walko, Donald A.

AU - Freeland, John W.

AU - Ryan, Philip J.

AU - Schaller, Richard D.

AU - Bhattacharya, Anand

AU - Wen, Haidan

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N2 - 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.

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