Large Elasto-Optic Effect in Epitaxial PbTiO(3) Films.
Identifieur interne : 002B99 ( Main/Exploration ); précédent : 002B98; suivant : 002C00Large Elasto-Optic Effect in Epitaxial PbTiO(3) Films.
Auteurs : Lan Chen [République populaire de Chine] ; Yurong Yang [États-Unis] ; Zhigang Gui [États-Unis] ; D. Sando [Australie] ; M. Bibes [France] ; X K Meng [République populaire de Chine] ; L. Bellaiche [États-Unis]Source :
- Physical review letters [ 1079-7114 ] ; 2015.
Abstract
First-principles calculations are performed to investigate the elasto-optic properties of four different structural phases in (001) epitaxial PbTiO(3) films under tensile strain: a tetragonal (T) phase and an orthorhombic (O) phase, which are the ground states for small and large strain, respectively, and two low-symmetry, monoclinic phases of Cm and Pm symmetries that have low total energy in the intermediate strain range. It is found that the refractive indices of the T and O phases respond differently to epitaxial strain, evidenced by a change of sign of their effective elasto-optic coefficients, and as a result of presently discovered correlations between refractive index, axial ratio, and magnitude of the ferroelectric polarization. The difference in refractive indices between T and O and the existence of such correlations naturally lead to large elasto-optic coefficients in the Cm and Pm states in the intermediate strain range, because Cm structurally bridges the T and O phases (via polarization rotation and a rapid change of its axial ratio) and Pm adopts a similar axial ratio and polarization magnitude to Cm. The present results therefore broaden the palette of functionalities of ferroelectric materials, and suggest new routes to generate systems with unprecedentedly large elasto-optic conversion.
DOI: 10.1103/PhysRevLett.115.267602
PubMed: 26765030
Affiliations:
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Bellaiche</name><affiliation wicri:level="1"><nlm:affiliation>Department of Physics and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Physics and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701</wicri:regionArea><wicri:noRegion>Arkansas 72701</wicri:noRegion></affiliation></author></analytic><series><title level="j">Physical review letters</title><idno type="eISSN">1079-7114</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">First-principles calculations are performed to investigate the elasto-optic properties of four different structural phases in (001) epitaxial PbTiO(3) films under tensile strain: a tetragonal (T) phase and an orthorhombic (O) phase, which are the ground states for small and large strain, respectively, and two low-symmetry, monoclinic phases of Cm and Pm symmetries that have low total energy in the intermediate strain range. It is found that the refractive indices of the T and O phases respond differently to epitaxial strain, evidenced by a change of sign of their effective elasto-optic coefficients, and as a result of presently discovered correlations between refractive index, axial ratio, and magnitude of the ferroelectric polarization. The difference in refractive indices between T and O and the existence of such correlations naturally lead to large elasto-optic coefficients in the Cm and Pm states in the intermediate strain range, because Cm structurally bridges the T and O phases (via polarization rotation and a rapid change of its axial ratio) and Pm adopts a similar axial ratio and polarization magnitude to Cm. The present results therefore broaden the palette of functionalities of ferroelectric materials, and suggest new routes to generate systems with unprecedentedly large elasto-optic conversion.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>République populaire de Chine</li><li>États-Unis</li></country></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Chen, Lan" sort="Chen, Lan" uniqKey="Chen L" first="Lan" last="Chen">Lan Chen</name></noRegion><name sortKey="Meng, X K" sort="Meng, X K" uniqKey="Meng X" first="X K" last="Meng">X K Meng</name></country><country name="États-Unis"><noRegion><name sortKey="Yang, Yurong" sort="Yang, Yurong" uniqKey="Yang Y" first="Yurong" last="Yang">Yurong Yang</name></noRegion><name sortKey="Bellaiche, L" sort="Bellaiche, L" uniqKey="Bellaiche L" first="L" last="Bellaiche">L. Bellaiche</name><name sortKey="Gui, Zhigang" sort="Gui, Zhigang" uniqKey="Gui Z" first="Zhigang" last="Gui">Zhigang Gui</name></country><country name="Australie"><noRegion><name sortKey="Sando, D" sort="Sando, D" uniqKey="Sando D" first="D" last="Sando">D. Sando</name></noRegion></country><country name="France"><noRegion><name sortKey="Bibes, M" sort="Bibes, M" uniqKey="Bibes M" first="M" last="Bibes">M. Bibes</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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