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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Ferroelastic Nanodomain-mediated Mechanical Switching of Ferroelectricity in Thick Epitaxial Films
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Ultrafast Ferroelectric Ordering on the Surface of a Topological Semimetal MoTe 2
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Tunable, Ferroelectricity-Inducing, Spin-Spiral Magnetic Ordering in Monolayer FeOCl
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Local Epitaxial Templating Effects in Ferroelectric and Antiferroelectric ZrO 2
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To Be or Not To Be Polar: The Ferroelectric and Antiferroelectric Nematic Phases
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Solvated Electrons in Solids—Ferroelectric Large Polarons in Lead Halide Perovskites
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Local atomic order and hierarchical polar nanoregions in a classical relaxor ferroelectric
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Strain-induced room-temperature ferroelectricity in SrTiO3 membranes
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Energy conversion and storage via photoinduced polarization change in non-ferroelectric molecular [CoGa] crystals
To alleviate the energy and environmental crisis, in the last decades, energy harvesting by utilizing optical control has emerged as a promising solution. Here we report a polar crystal that exhibits photoenergy conversion and energy storage upon light irradiation. The polar crystal consists of dinuclear [CoGa] molecules, which are oriented in a uniform direction inside the crystal lattice. Irradiation with green light induces a directional intramolecular electron transfer from the ligand to a low-spin Co III centre, and the resultant light-induced high-spin Co II excited state is trapped at low temperature, realizing energy storage. Additionally, electric current release is observed during relaxation from the trapped light-induced metastable state to the ground state, because the intramolecular electron transfer in the relaxation process is accompanied with macroscopic polarization switching at the single-crystal level. It demonstrates that energy storage and conversion to electrical energy is realized in the [CoGa] crystals, which is different from typical polar pyroelectric compounds that exhibit the conversion of thermal energy into electricity.
Unveiling the Pockels coefficient of ferroelectric nitride ScAlN
Not provided.