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Title: Topology breaking of the vortex in multiferroic Y{sub 0.67}Lu{sub 0.33}MnO{sub 3}

Although topological defects, such as domain walls (DWs) or vortices, are naturally protected by topological invariance, yet, we discover an exception that the six-state topology of the vortex with Z2 × Z3 symmetry is broken by a partial edge dislocation (PED) in hexagonal Y{sub 0.67}Lu{sub 0.33}MnO{sub 3}, where the topologies of the four-state vortex or closed DWs emerges. Using aberration-corrected scanning transmission electron microscopy, we found that the PED plays an important role in changing the phase of translation domain. The PED at the vortex core leads to the formation of the four-state vortex, while the ones at closed DWs connect different types of DWs, both corresponding to continuous phase changes. These results indicate that PEDs can change the topology of translation-related domain vortices and more vortices with even domains can be expected.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
  2. Department of Physics, Beijing Normal University, Beijing 100875 (China)
  3. (United States)
Publication Date:
OSTI Identifier:
22304476
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL DEFECTS; DOMAIN STRUCTURE; EDGE DISLOCATIONS; EXCEPTIONS; LUTETIUM COMPOUNDS; MANGANATES; SYMMETRY BREAKING; TOPOLOGY; TRANSMISSION ELECTRON MICROSCOPY; VORTICES; YTTRIUM COMPOUNDS