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

Li, Yuelin; Walko, Daonld A.; Li, Qing'an; Liu, Yaohua; Rosenkranz, Stephen; Zheng, Hong; Mitchell, J. F.

doi:10.1088/0953-8984/27/49/495602

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

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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, 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.

Authors:

Li, Yuelin ^[1]; Walko, Daonld A. ^[1]; Li, Qing'an ^[2]; Liu, Yaohua ^[3]; Rosenkranz, Stephen ^[2]; Zheng, Hong ^[2]; Mitchell, J. F. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Argonne National Lab. (ANL), Argonne, IL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Tue Nov 17 00:00:00 EST 2015

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.

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                    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.  https://doi.org/10.1088/0953-8984/27/49/495602

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                    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.  https://doi.org/10.1088/0953-8984/27/49/495602.  https://www.osti.gov/servlets/purl/1286932.

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@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         = {Tue Nov 17 00:00:00 EST 2015},

  month        = {Tue Nov 17 00:00:00 EST 2015}

}

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