Extended topological defects as sources and outlets of dislocations in spherical hexagonal crystals

Extended topological defects (ETDs) arising in spherical hexagonal crystals due to their curvature are considered. These prevalent defects carry a unit total topological charge and are surrounded by scalene pentagonal boundaries. Topological peculiarities of reactions between ETDs and dislocations a...

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Bibliographic Details
Published in:Physics letters. A 2014-04, Vol.378 (21), p.1548-1552
Main Authors: Roshal, D.S., Petrov, K.Yu, Myasnikova, A.E., Rochal, S.B.
Format: Article
Language:English
Subjects:
Boundaries
Charge
Colloidal crystals
Crystal defects
Current carriers
Curvature
Disclinations
Dislocations
Emittance
Solid state physics
Spherical structures
Topological defects
Topology
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Summary:Extended topological defects (ETDs) arising in spherical hexagonal crystals due to their curvature are considered. These prevalent defects carry a unit total topological charge and are surrounded by scalene pentagonal boundaries. Topological peculiarities of reactions between ETDs and dislocations are considered. Similarly to boundaries of the usual planar crystalline order the ETDs emit and absorb the dislocations without preservation of their dislocational charge. Dislocations located inside the ETD area lose it and the enforced ETD decay can proceed in different ways without conservation of the total Burgers vector of the dislocations emitted. •Reactions between defects in spherical order can change their total Burgers vector.•Extended topological defect is formed by a disclination and a set of vacancies.•Dislocations inside the topological defect area lose initial dislocation charges.•Shift of the extended topological defect emits or absorbs the dislocations.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2014.03.037