Terahertz field–induced ferroelectricity in quantum paraelectric SrTiO <sub>3</sub>
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- Xian Li
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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- Tian Qiu
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
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- Jiahao Zhang
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
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- Edoardo Baldini
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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- Jian Lu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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- Andrew M. Rappe
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
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- Keith A. Nelson
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
説明
<jats:title>Driving strontium titanate ferroelectric</jats:title> <jats:p> Hidden phases are metastable collective states of matter that are typically not accessible on equilibrium phase diagrams. Nova <jats:italic>et al.</jats:italic> used infrared pulses to excite higher-frequency lattice modes that drive the crystal into a metastable ferroelectric phase, a phase that can persist for many hours. X. Li <jats:italic>et al.</jats:italic> used terahertz fields to drive the soft mode that moves the ions in the crystal into the positions they occupy in the new phase. The ferroelectric phase in this case was transient, lasting on the order of 10 picoseconds. Because these hidden phases can host exotic properties in otherwise conventional materials, the accessibility to and control of such hidden phases may broaden potential functionality and applications. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6445" page="1075" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aaw4911">1075</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6445" page="1079" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aaw4913">1079</jats:related-article> </jats:p>
収録刊行物
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- Science
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Science 364 (6445), 1079-1082, 2019-06-14
American Association for the Advancement of Science (AAAS)
