Wall-wall and kink-kink interactions in ferroelastic materials


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Type
Article
Change log
Authors
Lu, G 
Ding, X 
Sun, J 
Abstract

Kinks interact with other kinks and antikinks elastically in ferroelastic domain walls and other interfaces in ferroic materials. In thin samples, suitable for transmission electron-microscopy, the interaction is purely dipolar with no indication of monopolar or higher order contributions. Kinks and antikinks attract each other while kink-kink interactions are repulsive. When the kinks are situated in two parallel twin walls, they display the same attraction/repulsion. We argue that this interaction constitutes, part or all, the elusive wall-wall interaction in ferroelastics. The dipolar interactions over distances d between the kinks and between walls decay as 1/d2 when the samples have some nano-scale size. Nano-scale samples bend and tilt when kinks are introduced with typical bent regions of some 1 nm and tilt angles of some 1.2o. Multiple kinks will enhance the effect systematically and bent and modulated twin walls are predicted.

Description
Keywords
5108 Quantum Physics, 51 Physical Sciences
Journal Title
Physical Review B
Conference Name
Journal ISSN
2469-9950
2469-9969
Volume Title
Publisher
American Physical Society (APS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/P024904/1)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (861153)