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

Shaobo Cheng, Jun Li, Myung-Geun Han, Shiqing Deng, Guotai Tan, Xixiang Zhang, Jing Zhu, Yimei Zhu

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

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 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.
Original languageEnglish (US)
JournalPhysical Review Letters
Volume118
Issue number14
DOIs
StatePublished - Apr 5 2017

Fingerprint

Dive into the research topics of 'Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification'. Together they form a unique fingerprint.

Cite this