Universality of Topological Vortex Domains in Layered Perovskites
ORAL
Abstract
In numerous functional materials, such as steels, ferroelectrics and magnets, new functionalities can be achieved through the engineering of the domain structures, which are associated with the ordering of certain parameters within the material. The recent progress in technologies that enable imaging at atomic-scale spatial resolution has transformed our understanding of domain topology: along with simple stripe-like or irregularly shaped domains, intriguing vortex-type topological domain configurations often appear in complex materials. It turns out that vortex domains are rather common in layered perovskites such as Ca3-xSrxTi2O7. In Ca3-xSrxTi2O7, the vortex domain formation, associated with the existence of abundant Néel-type ferroelectric walls, results in the presence of numerous conducting charged walls. The relationship between two distinct vortex domains and the emergence of polar-antipolar order at domain walls will be also discussed.
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The work at Rutgers is funded by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4413 to the Rutgers Center for Emergent Materials. The crystal growth at Rutgers was supported by the NSF MRI grant, MRI-1532006.
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Presenters
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Sang-Wook Cheong
- Rutgers University
- Department of Physics and Astronomy, Rutgers University
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey
- Physics, Rutgers University
- Physics and Astronomy, Rutgers University
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
- Physics and Astronomy, Rutgers Univ.
- Rutgers Univ
- Physics, Rutgers Univesity
- Department of Physics, Rutgers University
- Physics and Astronomy, Rutgers Center for Emergent Materials
- Department of Physics & Astronomy , Rutgers University