Topological defects at octahedral tilting plethora in bi-layered perovskites

Fei Ting Huang; Bin Gao; Jae Wook Kim; Xuan Luo; Yazhong Wang; Ming Wen Chu; Chung Kai Chang; Hwo Shuenn Sheu; Sang Wook Cheong

doi:https://doi.org/10.1038/npjquantmats.2016.17

Topological defects at octahedral tilting plethora in bi-layered perovskites

Fei Ting Huang, Bin Gao, Jae Wook Kim, Xuan Luo, Yazhong Wang, Ming Wen Chu, Chung Kai Chang, Hwo Shuenn Sheu, Sang Wook Cheong

School of Arts and Sciences, Physics & Astronomy

Rutgers, The State University

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

34 Scopus citations

Abstract

Oxygen octahedral distortions, including tilts/rotations, deformations and off-centring in (layered) perovskites, have the key role in their numerous functional properties. Near the polar-centrosymmetric phase boundary in bi-layered perovskite Ca₃ −_xSr_xTi₂O₇ with x≈1, we found the presence of abundant topological eight-state vortex-antivortex pairs, associated with four oxygen octahedral tilts at domains and another four different oxygen octahedral tilts at domain walls. Our discovery opens a new revenue to unveil realspace topological defects associated with the possible vector choices in one specific lattice mode.

Original language	English (US)
Article number	16017
Journal	npj Quantum Materials
Volume	1
DOIs	https://doi.org/10.1038/npjquantmats.2016.17
State	Published - Oct 7 2016

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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https://doi.org/10.1038/npjquantmats.2016.17

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@article{2c98b61017de435ebd423db78a9d9859,

title = "Topological defects at octahedral tilting plethora in bi-layered perovskites",

abstract = "Oxygen octahedral distortions, including tilts/rotations, deformations and off-centring in (layered) perovskites, have the key role in their numerous functional properties. Near the polar-centrosymmetric phase boundary in bi-layered perovskite Ca3 −xSrxTi2O7 with x≈1, we found the presence of abundant topological eight-state vortex-antivortex pairs, associated with four oxygen octahedral tilts at domains and another four different oxygen octahedral tilts at domain walls. Our discovery opens a new revenue to unveil realspace topological defects associated with the possible vector choices in one specific lattice mode.",

author = "Huang, {Fei Ting} and Bin Gao and Kim, {Jae Wook} and Xuan Luo and Yazhong Wang and Chu, {Ming Wen} and Chang, {Chung Kai} and Sheu, {Hwo Shuenn} and Cheong, {Sang Wook}",

note = "Funding Information: The work at Rutgers was funded by the Gordon and Betty Moore Foundation{\textquoteright}s EPiQS Initiative through Grant GBMF4413 to the Rutgers Center for Emergent Materials, and the work at Postech was supported by the Max Planck POSTECH/KOREA Research Initiative Program (grant no. 2011-0031558) through NRF of Korea funded by MSIP. Publisher Copyright: {\textcopyright} The Author(s) 2016.",

year = "2016",

month = oct,

day = "7",

doi = "https://doi.org/10.1038/npjquantmats.2016.17",

language = "English (US)",

volume = "1",

journal = "npj Quantum Materials",

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publisher = "Nature Publishing Group",

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AU - Huang, Fei Ting

AU - Gao, Bin

AU - Kim, Jae Wook

AU - Luo, Xuan

AU - Wang, Yazhong

AU - Chu, Ming Wen

AU - Chang, Chung Kai

AU - Sheu, Hwo Shuenn

AU - Cheong, Sang Wook

N1 - Funding Information: The work at Rutgers was funded by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4413 to the Rutgers Center for Emergent Materials, and the work at Postech was supported by the Max Planck POSTECH/KOREA Research Initiative Program (grant no. 2011-0031558) through NRF of Korea funded by MSIP. Publisher Copyright: © The Author(s) 2016.

PY - 2016/10/7

Y1 - 2016/10/7

N2 - Oxygen octahedral distortions, including tilts/rotations, deformations and off-centring in (layered) perovskites, have the key role in their numerous functional properties. Near the polar-centrosymmetric phase boundary in bi-layered perovskite Ca3 −xSrxTi2O7 with x≈1, we found the presence of abundant topological eight-state vortex-antivortex pairs, associated with four oxygen octahedral tilts at domains and another four different oxygen octahedral tilts at domain walls. Our discovery opens a new revenue to unveil realspace topological defects associated with the possible vector choices in one specific lattice mode.

AB - Oxygen octahedral distortions, including tilts/rotations, deformations and off-centring in (layered) perovskites, have the key role in their numerous functional properties. Near the polar-centrosymmetric phase boundary in bi-layered perovskite Ca3 −xSrxTi2O7 with x≈1, we found the presence of abundant topological eight-state vortex-antivortex pairs, associated with four oxygen octahedral tilts at domains and another four different oxygen octahedral tilts at domain walls. Our discovery opens a new revenue to unveil realspace topological defects associated with the possible vector choices in one specific lattice mode.

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ER -

Topological defects at octahedral tilting plethora in bi-layered perovskites

Abstract

ASJC Scopus subject areas

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