Topologically Protected Generation of Stable Wall Loops in Nematic Liquid Crystals

Ouchi, Tomohiro; Imamura, Koki; Sunami, Kanta et al.

Physical Review Letters, 2019, 123(9), 097801-097801

Number of Access:548（2025-09-02 10:25 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/75693

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Title
Topologically Protected Generation of Stable Wall Loops in Nematic Liquid Crystals
Creator
CreatorName
Ouchi, Tomohiro
CreatorName
Imamura, Koki
CreatorName
Sunami, Kanta
NRID
1000080550045 1000080550045
researchmap permalink
hiroyukiyoshida hiroyukiyoshida
Scopus Author ID
55628543086 55628543086
CreatorName
Yoshida, Hiroyuki
NRID
1000050204186 1000050204186
ORCID
0000-0002-9556-4225 0000-0002-9556-4225
researchmap permalink
read0014092 read0014092
Scopus Author ID
55490143900 55490143900
CreatorName
Ozaki, Masanori
Abstract
The nematic liquid crystal (LC) director field can contain defects that are both singular and nonsingular, but nonsingular defects with an integer winding number of the director are typically metastable because of their high energy. We demonstrate topology-mediated generation and stabilization of nonsingular wall loops in a sandwich-type LC cell by combining a patterned substrate with a planar substrate. We implement a design which imposes a topological constraint on a singular disclination loop such that it irreversibly annihilates upon application of a field, and it results in the generation of a stable nonsingular wall loop when the field is removed. Theoretical modeling agrees with experimental observations, providing insight into the wall generation mechanism and its stability. The concept to stabilize high-energy structures through orientation-patterning-defined topological constraints extends our ability to control orientationally ordered matter.
Publisher
American Physical Society
Source Title
Physical Review Letters
Volume (Issue)
123(9)
Page
097801-097801
Date of Issued
2019-08-29
Language
English
Handle URL
https://hdl.handle.net/11094/75693
PISSN
00319007
eISSN
10797114
NCID
AA00773679
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1103/PhysRevLett.123.097801
Access Rights
open access
CopyRight
Copyright (2019) by the American Physical Society
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article