Dynamics of a Persistent Insulator-to-Metal Transition in Strained Manganite Films
Name
PhysRevLett.123.267201.pdf
Description
Published version
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581.94 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Teitelbaum, Samuel Welch
Ofori-Okai, Benjamin Kwasi
Cheng, Yu-Hsiang
Zhang, Jingdi
Jin, Feng
Wu, Wenbin
Averitt, Richard D.
Nelson, Keith Adam
Date Issued
December 2019
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Teitelbaum, Samuel W. et al. "Dynamics of a Persistent Insulator-to-Metal Transition in Strained Manganite Films." Physical Review Letters 123, 26 (December 2019): 267201 © 2019 American Physical Society.
Version
Final published version
Abstract
Transition metal oxides possess complex free-energy surfaces with competing degrees of freedom. Photoexcitation allows shaping of such rich energy landscapes. In epitaxially strained La[subscript 0.67]Ca[subscript 0.33]MnO[subscript 3], optical excitation with a sub-100-fs pulse above 2 mJ/cm[superscript 2] leads to a persistent metallic phase below 100 K. Using single-shot optical and terahertz spectroscopy, we show that this phase transition is a multistep process. We conclude that the phase transition is driven by partial charge-order melting, followed by growth of the persistent metallic phase on longer timescales. A time-dependent Ginzburg-Landau model can describe the fast dynamics of the reflectivity, followed by longer timescale in-growth of the metallic phase.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.123.267201
