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Cooperative photoinduced metastable phase control in strained manganite films

Author(s)
Zhang, Jingdi; Tan, Xuelian; Liu, Mengkun; Post, K. W.; Jin, Feng; Basov, D. N.; Wu, Wenbin; Averitt, R. D.; Teitelbaum, Samuel Welch; Nelson, Keith Adam; ... Show more Show less
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
A major challenge in condensed-matter physics is active control of quantum phases. Dynamic control with pulsed electromagnetic fields can overcome energetic barriers, enabling access to transient or metastable states that are not thermally accessible. Here we demonstrate strain-engineered tuning of La[subscript 2/3]Ca[subscript 1/3]MnO[subscript 3] into an emergent charge-ordered insulating phase with extreme photo-susceptibility, where even a single optical pulse can initiate a transition to a long-lived metastable hidden metallic phase. Comprehensive single-shot pulsed excitation measurements demonstrate that the transition is cooperative and ultrafast, requiring a critical absorbed photon density to activate local charge excitations that mediate magnetic–lattice coupling that, in turn, stabilize the metallic phase. These results reveal that strain engineering can tune emergent functionality towards proximal macroscopic states to enable dynamic ultrafast optical phase switching and control.
Date issued
2016-07
URI
http://hdl.handle.net/1721.1/107133
Department
Massachusetts Institute of Technology. Department of Chemistry
Journal
Nature Materials
Publisher
Nature Publishing Group
Citation
Zhang, Jingdi et al. “Cooperative Photoinduced Metastable Phase Control in Strained Manganite Films.” Nature Materials 15.9 (2016): 956–960.
Version: Author's final manuscript
ISSN
1476-1122
1476-4660

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