skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Evidence of photo-induced dynamic competition of metallic and insulating phase in a layered manganite

Abstract

We show evidence that the competition between the antiferromagetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr 2Mn 2O 7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, which indicates the formation of the charge and orbital order, was measured at different laser fluences. The laser-induced enhancement and reduction the Jahn-Teller reflection intensity shows a reversal of sign between earlier (~10 ns) and later (~150 ns) time delays during the relaxation after photo excitation. This effect is consistent with a scenario whereby the laser excitation modulates the local competition between the metallic and the insulating phases.

Authors:
 [1];  [1];  [2];  [3];  [2];  [2];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1286932
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 27; Journal Issue: 49; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Li, Yuelin, Walko, Daonld A., Li, Qing'an, Liu, Yaohua, Rosenkranz, Stephen, Zheng, Hong, and Mitchell, J. F. Evidence of photo-induced dynamic competition of metallic and insulating phase in a layered manganite. United States: N. p., 2015. Web. doi:10.1088/0953-8984/27/49/495602.
Li, Yuelin, Walko, Daonld A., Li, Qing'an, Liu, Yaohua, Rosenkranz, Stephen, Zheng, Hong, & Mitchell, J. F. Evidence of photo-induced dynamic competition of metallic and insulating phase in a layered manganite. United States. doi:10.1088/0953-8984/27/49/495602.
Li, Yuelin, Walko, Daonld A., Li, Qing'an, Liu, Yaohua, Rosenkranz, Stephen, Zheng, Hong, and Mitchell, J. F. Tue . "Evidence of photo-induced dynamic competition of metallic and insulating phase in a layered manganite". United States. doi:10.1088/0953-8984/27/49/495602. https://www.osti.gov/servlets/purl/1286932.
@article{osti_1286932,
title = {Evidence of photo-induced dynamic competition of metallic and insulating phase in a layered manganite},
author = {Li, Yuelin and Walko, Daonld A. and Li, Qing'an and Liu, Yaohua and Rosenkranz, Stephen and Zheng, Hong and Mitchell, J. F.},
abstractNote = {We show evidence that the competition between the antiferromagetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr2Mn2O7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, which indicates the formation of the charge and orbital order, was measured at different laser fluences. The laser-induced enhancement and reduction the Jahn-Teller reflection intensity shows a reversal of sign between earlier (~10 ns) and later (~150 ns) time delays during the relaxation after photo excitation. This effect is consistent with a scenario whereby the laser excitation modulates the local competition between the metallic and the insulating phases.},
doi = {10.1088/0953-8984/27/49/495602},
journal = {Journal of Physics. Condensed Matter},
number = 49,
volume = 27,
place = {United States},
year = {2015},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: