Dynamics of a Persistent Insulator-to-Metal Transition in Strained Manganite Films
[1];
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[3];
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- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); OSTI
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Univ. of California, San Diego, La Jolla, CA (United States); The Hong Kong University of Science and Technology, Hong Kong (China)
- Anhui University, Hefei (China); Chinese Academy of Sciences (CAS), Hefei (China)
- University of Science and Technology of China, Hefei (China): Chinese Academy of Sciences (CAS), Hefei (China); Anhui University, Hefei (China)
- Univ. of California, San Diego, La Jolla, CA (United States)
Transition metal oxides possess complex free-energy surfaces with competing degrees of freedom. Photoexcitation allows shaping of such rich energy landscapes. In epitaxially strained La0.67Ca0.33MnO3, optical excitation with a sub-100-fs pulse above 2 mJ/cm2 leads to a persistent metallic phase below 100 K. Here, 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.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (United States)
- Sponsoring Organization:
- Chinese Academy of Sciences (CAS); National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); National key R&D Program of China; Samsung; US Department of the Navy, Office of Naval Research (ONR); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012375
- OSTI ID:
- 1802334
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 123; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Low-frequency and Moiré–Floquet engineering: A review
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journal | March 2021 |
| Nonthermal pathways to ultrafast control in quantum materials | text | January 2021 |
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