Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice

Deepankar Sri Gyan; Hyeon Jun Lee; Youngjun Ahn; River B. Carson; Jerome Carnis; Tae Yeon Kim; Sanjith Unithrattil; Jun Young Lee; Sae Hwan Chun; Sunam Kim; Intae Eom; Minseok Kim; Sang Youn Park; Kyung Sook Kim; Ho Nyung Lee; Ji Young Jo; Paul G. Evans

doi:10.1002/aelm.202101051

Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice

Deepankar Sri Gyan, Hyeon Jun Lee, Youngjun Ahn, River B. Carson, Jerome Carnis, Tae Yeon Kim, Sanjith Unithrattil, Jun Young Lee, Sae Hwan Chun, Sunam Kim, Intae Eom, Minseok Kim, Sang Youn Park, Kyung Sook Kim, Ho Nyung Lee, Ji Young Jo, Paul G. Evans

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

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Abstract

Above-bandgap femtosecond optical excitation of a ferroelectric/dielectric BaTiO₃/CaTiO₃ superlattice leads to structural responses that are a consequence of the screening of the strong electrostatic coupling between the component layers. Time-resolved X-ray free-electron laser diffraction shows that the structural response to optical excitation includes a net lattice expansion of the superlattice consistent with depolarization-field screening driven by the photoexcited charge carriers. The depolarization-field-screening-driven expansion is separate from a photoacoustic pulse launched from the bottom electrode on which the superlattice is epitaxially grown. The distribution of diffracted intensity of superlattice X-ray reflections indicates that the depolarization-field-screening-induced strain includes a photoinduced expansion in the ferroelectric BaTiO₃ and a contraction in CaTiO₃. The magnitude of expansion in BaTiO₃ layers is larger than the contraction in CaTiO₃. The difference in the magnitude of depolarization-field-screening-driven strain in the BaTiO₃ and CaTiO₃ components can arise from the contribution of the oxygen octahedral rotation patterns at the BaTiO₃/CaTiO₃ interfaces to the polarization of CaTiO₃. The depolarization-field-screening-driven polarization reduction in the CaTiO₃ layers points to a new direction for the manipulation of polarization in the component layers of a strongly coupled ferroelectric/dielectric superlattice.

Original language	English
Article number	2101051
Journal	Advanced Electronic Materials
Volume	8
Issue number	6
DOIs	https://doi.org/10.1002/aelm.202101051
State	Published - Jun 2022

Funding

The authors acknowledge support from the U.S. DOE, Basic Energy Sciences, Materials Sciences and Engineering Division, under contract no. DE-FG02-04ER46147. H.J.L. acknowledges support by the National Research Foundation of Korea under grant 2017R1A6A3A11030959. Y.J.A. acknowledges support from the National Science Foundation through grant number DMR-1609545. J.C. acknowledges support from the CNRS project GOtoXFEL. The authors acknowledge the use of characterization facilities supported by the National Science Foundation through the University of Wisconsin Materials Research Science and Engineering Center (DMR-1720415). The experiment was performed at the XSS beamline of PAL-XFEL (proposal no. 2018-2nd-XSS-016) funded by the Ministry of Science and ICT of Korea. The synthesis work at ORNL was supported by U.S. DOE, Basic Energy Sciences, Materials Sciences and Engineering Division. The authors acknowledge support from the U.S. DOE, Basic Energy Sciences, Materials Sciences and Engineering Division, under contract no. DE‐FG02‐04ER46147. H.J.L. acknowledges support by the National Research Foundation of Korea under grant 2017R1A6A3A11030959. Y.J.A. acknowledges support from the National Science Foundation through grant number DMR‐1609545. J.C. acknowledges support from the CNRS project GOtoXFEL. The authors acknowledge the use of characterization facilities supported by the National Science Foundation through the University of Wisconsin Materials Research Science and Engineering Center (DMR‐1720415). The experiment was performed at the XSS beamline of PAL‐XFEL (proposal no. 2018‐2nd‐XSS‐016) funded by the Ministry of Science and ICT of Korea. The synthesis work at ORNL was supported by U.S. DOE, Basic Energy Sciences, Materials Sciences and Engineering Division.

Funders	Funder number
University of Wisconsin Materials Research Science and Engineering Center	2018‐2nd‐XSS‐016, DMR‐1720415
National Science Foundation	DMR‐1609545
U.S. Department of Energy
Basic Energy Sciences
College of Natural Resources and Sciences, Humboldt State University
Division of Materials Sciences and Engineering	DE‐FG02‐04ER46147
Ministry of Science, ICT and Future Planning
National Research Foundation of Korea	2017R1A6A3A11030959
Centre National de la Recherche Scientifique

Keywords

X-ray free-electron laser diffraction
depolarization-field screening
ferroelectric/dielectric superlattice
ultrafast structural phenomena

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10.1002/aelm.202101051

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Sri Gyan, D., Lee, H. J., Ahn, Y., Carson, R. B., Carnis, J., Kim, T. Y., Unithrattil, S., Lee, J. Y., Chun, S. H., Kim, S., Eom, I., Kim, M., Park, S. Y., Kim, K. S., Lee, H. N., Jo, J. Y., & Evans, P. G. (2022). Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice. Advanced Electronic Materials, 8(6), Article 2101051. https://doi.org/10.1002/aelm.202101051

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title = "Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice",

abstract = "Above-bandgap femtosecond optical excitation of a ferroelectric/dielectric BaTiO3/CaTiO3 superlattice leads to structural responses that are a consequence of the screening of the strong electrostatic coupling between the component layers. Time-resolved X-ray free-electron laser diffraction shows that the structural response to optical excitation includes a net lattice expansion of the superlattice consistent with depolarization-field screening driven by the photoexcited charge carriers. The depolarization-field-screening-driven expansion is separate from a photoacoustic pulse launched from the bottom electrode on which the superlattice is epitaxially grown. The distribution of diffracted intensity of superlattice X-ray reflections indicates that the depolarization-field-screening-induced strain includes a photoinduced expansion in the ferroelectric BaTiO3 and a contraction in CaTiO3. The magnitude of expansion in BaTiO3 layers is larger than the contraction in CaTiO3. The difference in the magnitude of depolarization-field-screening-driven strain in the BaTiO3 and CaTiO3 components can arise from the contribution of the oxygen octahedral rotation patterns at the BaTiO3/CaTiO3 interfaces to the polarization of CaTiO3. The depolarization-field-screening-driven polarization reduction in the CaTiO3 layers points to a new direction for the manipulation of polarization in the component layers of a strongly coupled ferroelectric/dielectric superlattice.",

keywords = "X-ray free-electron laser diffraction, depolarization-field screening, ferroelectric/dielectric superlattice, ultrafast structural phenomena",

author = "{Sri Gyan}, Deepankar and Lee, {Hyeon Jun} and Youngjun Ahn and Carson, {River B.} and Jerome Carnis and Kim, {Tae Yeon} and Sanjith Unithrattil and Lee, {Jun Young} and Chun, {Sae Hwan} and Sunam Kim and Intae Eom and Minseok Kim and Park, {Sang Youn} and Kim, {Kyung Sook} and Lee, {Ho Nyung} and Jo, {Ji Young} and Evans, {Paul G.}",

note = "Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH.",

year = "2022",

month = jun,

doi = "10.1002/aelm.202101051",

language = "English",

volume = "8",

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Sri Gyan, D, Lee, HJ, Ahn, Y, Carson, RB, Carnis, J, Kim, TY, Unithrattil, S, Lee, JY, Chun, SH, Kim, S, Eom, I, Kim, M, Park, SY, Kim, KS, Lee, HN, Jo, JY & Evans, PG 2022, 'Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice', Advanced Electronic Materials, vol. 8, no. 6, 2101051. https://doi.org/10.1002/aelm.202101051

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T1 - Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice

AU - Sri Gyan, Deepankar

AU - Lee, Hyeon Jun

AU - Ahn, Youngjun

AU - Carson, River B.

AU - Carnis, Jerome

AU - Kim, Tae Yeon

AU - Unithrattil, Sanjith

AU - Lee, Jun Young

AU - Chun, Sae Hwan

AU - Kim, Sunam

AU - Eom, Intae

AU - Kim, Minseok

AU - Park, Sang Youn

AU - Kim, Kyung Sook

AU - Lee, Ho Nyung

AU - Jo, Ji Young

AU - Evans, Paul G.

PY - 2022/6

Y1 - 2022/6

N2 - Above-bandgap femtosecond optical excitation of a ferroelectric/dielectric BaTiO3/CaTiO3 superlattice leads to structural responses that are a consequence of the screening of the strong electrostatic coupling between the component layers. Time-resolved X-ray free-electron laser diffraction shows that the structural response to optical excitation includes a net lattice expansion of the superlattice consistent with depolarization-field screening driven by the photoexcited charge carriers. The depolarization-field-screening-driven expansion is separate from a photoacoustic pulse launched from the bottom electrode on which the superlattice is epitaxially grown. The distribution of diffracted intensity of superlattice X-ray reflections indicates that the depolarization-field-screening-induced strain includes a photoinduced expansion in the ferroelectric BaTiO3 and a contraction in CaTiO3. The magnitude of expansion in BaTiO3 layers is larger than the contraction in CaTiO3. The difference in the magnitude of depolarization-field-screening-driven strain in the BaTiO3 and CaTiO3 components can arise from the contribution of the oxygen octahedral rotation patterns at the BaTiO3/CaTiO3 interfaces to the polarization of CaTiO3. The depolarization-field-screening-driven polarization reduction in the CaTiO3 layers points to a new direction for the manipulation of polarization in the component layers of a strongly coupled ferroelectric/dielectric superlattice.

AB - Above-bandgap femtosecond optical excitation of a ferroelectric/dielectric BaTiO3/CaTiO3 superlattice leads to structural responses that are a consequence of the screening of the strong electrostatic coupling between the component layers. Time-resolved X-ray free-electron laser diffraction shows that the structural response to optical excitation includes a net lattice expansion of the superlattice consistent with depolarization-field screening driven by the photoexcited charge carriers. The depolarization-field-screening-driven expansion is separate from a photoacoustic pulse launched from the bottom electrode on which the superlattice is epitaxially grown. The distribution of diffracted intensity of superlattice X-ray reflections indicates that the depolarization-field-screening-induced strain includes a photoinduced expansion in the ferroelectric BaTiO3 and a contraction in CaTiO3. The magnitude of expansion in BaTiO3 layers is larger than the contraction in CaTiO3. The difference in the magnitude of depolarization-field-screening-driven strain in the BaTiO3 and CaTiO3 components can arise from the contribution of the oxygen octahedral rotation patterns at the BaTiO3/CaTiO3 interfaces to the polarization of CaTiO3. The depolarization-field-screening-driven polarization reduction in the CaTiO3 layers points to a new direction for the manipulation of polarization in the component layers of a strongly coupled ferroelectric/dielectric superlattice.

KW - X-ray free-electron laser diffraction

KW - depolarization-field screening

KW - ferroelectric/dielectric superlattice

KW - ultrafast structural phenomena

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DO - 10.1002/aelm.202101051

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VL - 8

JO - Advanced Electronic Materials

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IS - 6

M1 - 2101051

ER -

Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice

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