Terahertz field–induced ferroelectricity in quantum paraelectric SrTiO[subscript 3]
Name
1812.10785.pdf
Description
Submitted version
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757.51 KB
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Checksum (MD5)
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Author(s)
Li, Xian
Qiu, Tian
Zhang, Jiahao
Baldini, Edoardo
Lu, Jian
Rappe, Andrew M.
Nelson, Keith Adam
Date Issued
June 2019
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Li, Xian et al. "Terahertz field–induced ferroelectricity in quantum paraelectric SrTiO[subscript 3]." Science 364, 6445 (June 14, 2019): 1079-1082 © 2019 The Author(s)
Version
Original manuscript
Abstract
"Hidden phases” are metastable collective states of matter that are typically not accessible on equilibrium phase diagrams. These phases can host exotic properties in otherwise conventional materials and hence may enable novel functionality and applications, but their discovery and access are still in early stages. Using intense terahertz electric field excitation, we found that an ultrafast phase transition into a hidden ferroelectric phase can be dynamically induced in quantum paraelectric strontium titanate (SrTiO[subscript 3]). The induced lowering in crystal symmetry yields substantial changes in the phonon excitation spectra. Our results demonstrate collective coherent control over material structure, in which a single-cycle field drives ions along the microscopic pathway leading directly to their locations in a new crystalline phase on an ultrafast time scale.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1126/science.aaw4913
