Engineering polar vortex from topologically trivial domain architecture

Tan，Congbing1,2,3; Dong，Yongqi4,5; Sun，Yuanwei6,7; Liu，Chang8,9; Chen，Pan10; Zhong，Xiangli2; Zhu，Ruixue6,7; Liu，Mingwei1; Zhang，Jingmin7; Wang，Jinbin2; Liu，Kaihui7,11; Bai，Xuedong10; Yu，Dapeng11,12,13; Ouyang，Xiaoping2; Wang，Jie8,14; Gao，Peng6,7,11,15; Luo，Zhenlin5; Li，Jiangyu3,4,16

2021-12-01

10.1038/s41467-021-24922-y

Nature Communications   影响因子和分区

2041-1723

Topologically nontrivial polar structures are not only attractive for high-density data storage, but also for ultralow power microelectronics thanks to their exotic negative capacitance. The vast majority of polar structures emerging naturally in ferroelectrics, however, are topologically trivial, and there are enormous interests in artificially engineered polar structures possessing nontrivial topology. Here we demonstrate reconstruction of topologically trivial strip-like domain architecture into arrays of polar vortex in (PbTiO)/(SrTiO) superlattice, accomplished by fabricating a cross-sectional lamella from the superlattice film. Using a combination of techniques for polarization mapping, atomic imaging, and three-dimensional structure visualization supported by phase field simulations, we reveal that the reconstruction relieves biaxial epitaxial strain in thin film into a uniaxial one in lamella, changing the subtle electrostatic and elastostatic energetics and providing the driving force for the polar vortex formation. The work establishes a realistic strategy for engineering polar topologies in otherwise ordinary ferroelectric superlattices.

SCI

英语

NI期刊

通讯

WOS:000684302500001

2-s2.0-85111691863

Scopus

1.Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials,School of Physics and Electronics,Hunan University of Science and Technology,Xiangtan,China
2.School of Materials Science and Engineering,Xiangtan University,Xiangtan,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,China
4.Shenzhen Key Laboratory of Nanobiomechanics,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen,China
5.National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei,China
6.International Center for Quantum Materials,Peking University,Beijing,China
7.Electron Microscopy Laboratory,School of Physics,Peking University,Beijing,China
8.Department of Engineering Mechanics,School of Aeronautics and Astronautics,Zhejiang University,Hangzhou,China
9.Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,School of Mechanics and Engineering,Southwest Jiaotong University,Chengdu,China
10.Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing,China
11.Collaborative Innovation Centre of Quantum Matter,Beijing,China
12.State Key Laboratory for Artificial Microstructure and Mesoscopic Physics,School of Physics,Peking University,Beijing,China
13.Shenzhen Key Laboratory of Quantum Science and Engineering,Shenzhen,China
14.Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Zhejiang University,Hangzhou,China
15.Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing,China
16.Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices,Southern University of Science and Technology,Shenzhen,China

Tan，Congbing,Dong，Yongqi,Sun，Yuanwei,et al. Engineering polar vortex from topologically trivial domain architecture[J]. Nature Communications,2021,12(1).

Tan，Congbing.,Dong，Yongqi.,Sun，Yuanwei.,Liu，Chang.,Chen，Pan.,...&Li，Jiangyu.(2021).Engineering polar vortex from topologically trivial domain architecture.Nature Communications,12(1).

Tan，Congbing,et al."Engineering polar vortex from topologically trivial domain architecture".Nature Communications 12.1(2021).