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

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 electronic phases 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 La1/3Sr2/3FeO3 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. As a result, this extraordinary long electronic recovery time exemplifies an interplay of ordered electronic phases with magnetism beyond thermal processes in correlated systems.

Authors:
 [1];  [1];  [2];  [3];  [1]; ORCiD logo [1];  [4];  [2]; ORCiD logo [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois at Chicago, Chicago, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Dublin City Univ., Dublin (Ireland)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1436464
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electronic properties and materials; Magnetic properties and materials; Phase transitions and critical phenomena

Citation Formats

Zhu, Yi, Hoffman, Jason, Rowland, Clare E., Park, Hyowon, Walko, Donald A., Freeland, John W., Ryan, Philip J., Schaller, Richard D., Bhattacharya, Anand, and Wen, Haidan. Unconventional slowing down of electronic recovery in photoexcited charge-ordered La1/3Sr2/3FeO3. United States: N. p., 2018. Web. https://doi.org/10.1038/s41467-018-04199-4.
Zhu, Yi, Hoffman, Jason, Rowland, Clare E., Park, Hyowon, Walko, Donald A., Freeland, John W., Ryan, Philip J., Schaller, Richard D., Bhattacharya, Anand, & Wen, Haidan. Unconventional slowing down of electronic recovery in photoexcited charge-ordered La1/3Sr2/3FeO3. United States. https://doi.org/10.1038/s41467-018-04199-4
Zhu, Yi, Hoffman, Jason, Rowland, Clare E., Park, Hyowon, Walko, Donald A., Freeland, John W., Ryan, Philip J., Schaller, Richard D., Bhattacharya, Anand, and Wen, Haidan. Fri . "Unconventional slowing down of electronic recovery in photoexcited charge-ordered La1/3Sr2/3FeO3". United States. https://doi.org/10.1038/s41467-018-04199-4. https://www.osti.gov/servlets/purl/1436464.
@article{osti_1436464,
title = {Unconventional slowing down of electronic recovery in photoexcited charge-ordered La1/3Sr2/3FeO3},
author = {Zhu, Yi and Hoffman, Jason and Rowland, Clare E. and Park, Hyowon and Walko, Donald A. and Freeland, John W. and Ryan, Philip J. and Schaller, Richard D. and Bhattacharya, Anand and Wen, Haidan},
abstractNote = {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 electronic phases 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 La1/3Sr2/3FeO3 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. As a result, this extraordinary long electronic recovery time exemplifies an interplay of ordered electronic phases with magnetism beyond thermal processes in correlated systems.},
doi = {10.1038/s41467-018-04199-4},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {5}
}

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