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Title: Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification

Here, we report structural transformation of sixfold vortex domains into two-, four-, and eightfold vortices via a different type of topological defect in hexagonal manganites. Combining high-resolution electron microscopy and Landau-theory-based numerical simulations, we also investigate the remarkable atomic arrangement and the intertwined relationship between the vortex structures and the topological defects. The roles of their displacement field, formation temperature, and nucleation sites are revealed. All conceivable vortices in the system are topologically classified using homotopy group theory, and their origins are identified.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [2] ;  [4] ;  [3]
  1. Tsinghua Univ., Beijing (China). School of Materials Science and Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Condensed Matter Physics and Materials Science
  2. King Abdullah Univ. of Science and Technology, Thuwal (Saudi Arabia). Division of Physical and Science Engineering
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Condensed Matter Physics and Materials Science
  4. Tsinghua Univ., Beijing (China). School of Materials Science and Engineering
  5. Beijing Normal Univ., Beijing (China, People's Republic of). Dept. of Physics
Publication Date:
Report Number(s):
BNL-114367-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: MA015MACA; KC0201010; TRN: US1800317
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1412651
Alternate Identifier(s):
OSTI ID: 1349972

Cheng, Shaobo, Li, Jun, Han, Myung-Geun, Deng, Shiqing, Tan, Guotai, Zhang, Xixiang, Zhu, Jing, and Zhu, Yimei. Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification. United States: N. p., Web. doi:10.1103/PhysRevLett.118.145501.
Cheng, Shaobo, Li, Jun, Han, Myung-Geun, Deng, Shiqing, Tan, Guotai, Zhang, Xixiang, Zhu, Jing, & Zhu, Yimei. Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification. United States. doi:10.1103/PhysRevLett.118.145501.
Cheng, Shaobo, Li, Jun, Han, Myung-Geun, Deng, Shiqing, Tan, Guotai, Zhang, Xixiang, Zhu, Jing, and Zhu, Yimei. 2017. "Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification". United States. doi:10.1103/PhysRevLett.118.145501. https://www.osti.gov/servlets/purl/1412651.
@article{osti_1412651,
title = {Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification},
author = {Cheng, Shaobo and Li, Jun and Han, Myung-Geun and Deng, Shiqing and Tan, Guotai and Zhang, Xixiang and Zhu, Jing and Zhu, Yimei},
abstractNote = {Here, we report structural transformation of sixfold vortex domains into two-, four-, and eightfold vortices via a different type of topological defect in hexagonal manganites. Combining high-resolution electron microscopy and Landau-theory-based numerical simulations, we also investigate the remarkable atomic arrangement and the intertwined relationship between the vortex structures and the topological defects. The roles of their displacement field, formation temperature, and nucleation sites are revealed. All conceivable vortices in the system are topologically classified using homotopy group theory, and their origins are identified.},
doi = {10.1103/PhysRevLett.118.145501},
journal = {Physical Review Letters},
number = 14,
volume = 118,
place = {United States},
year = {2017},
month = {4}
}

Works referenced in this record:

Quantitative measurement of displacement and strain fields from HREM micrographs
journal, August 1998