Topological defects at octahedral tilting plethora in bi-layered perovskites

被引：50

作者：

Huang, Fei-Ting ^{[1
,2
]}

Gao, Bin ^{[1
,2
]}

Kim, Jae-Wook ^{[1
,2
]}

Luo, Xuan ^{[3
,4
]}

Wang, Yazhong ^{[1
,2
]}

Chu, Ming-Wen ^{[5
]}

Chang, Chung-Kai ^{[6
]}

Sheu, Hwo-Shuenn ^{[6
]}

Cheong, Sang-Wook ^{[1
,2
,3
,4
]}

机构：

[1] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[3] Pohang Univ Sci & Technol, Lab Pohang Emergent Mat, Pohang, South Korea

[4] Pohang Univ Sci & Technol, Max Plank POSTECH Ctr Complex Phase Mat, Pohang, South Korea

[5] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei, Taiwan

[6] Natl Synchrotron Radiat Res Ctr, Hsinchu, Taiwan

来源：

NPJ QUANTUM MATERIALS | 2016年 / 1卷

关键词：

DOMAIN-WALLS; FERROELECTRICITY; MANGANITES; CRYSTAL; LA2-XBAXCUO4; TRANSITIONS; PHYSICS; OXIDES; FILMS;

D O I：

10.1038/npjquantmats.2016.17

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 approximate to 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 real-space topological defects associated with the possible vector choices in one specific lattice mode.

引用

页数：6

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