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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Presenters

  • 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

Authors

  • 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

  • Fei-Ting Huang

    Rutgers University, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University

  • Bin Gao

    Physics and Astronomy, Rutgers Center for Emergent Materials, Rutgers University