Homotopy-Theoretic Study & Atomic-Scale Observation of Vortex Domains in Hexagonal Manganites

Essential structural properties of the non-trivial “string-wall-bounded” topological defects in hexagonal manganites are studied through homotopy group theory and spherical aberration-corrected scanning transmission electron microscopy. The appearance of a “string-wall-bounded” configuration in R Mn...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2016-06, Vol.6 (1), p.28047-28047, Article 28047
Main Authors: Li, Jun, Chiang, Fu-Kuo, Chen, Zhen, Ma, Chao, Chu, Ming-Wen, Chen, Cheng-Hsuan, Tian, Huanfang, Yang, Huaixin, Li, Jianqi
Format: Article
Language:English
Subjects:
639/301/119/996
639/766/119/1002
Defects
Electrons
Energy
Humanities and Social Sciences
multidisciplinary
Phase transitions
Physical properties
Physics
Science
Symmetry
Temperature
Vortices
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Essential structural properties of the non-trivial “string-wall-bounded” topological defects in hexagonal manganites are studied through homotopy group theory and spherical aberration-corrected scanning transmission electron microscopy. The appearance of a “string-wall-bounded” configuration in R MnO 3 is shown to be strongly linked with the transformation of the degeneracy space. The defect core regions (~50 Å) mainly adopt the continuous U (1) symmetry of the high-temperature phase, which is essential for the formation and proliferation of vortices. Direct visualization of vortex strings at atomic scale provides insight into the mechanisms and macro-behavior of topological defects in crystalline materials.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep28047