University of Cambridge > > Electron Microscopy Group Seminars

Topological defects in mesoscopic and complex crystals

Recent experiments have revealed new forms and new dynamics of topological defects in mesoscopic and complex crystals, such as flux-closure ferroelectric vortices in oxide superlattices, magnetic skyrmions in thin-films, dislocations and grain boundaries in graphene. At the same time, the development of new multiple components materials, such as high entropy alloys, challenges our traditional understanding of crystal defects and presents opportunities for the discovery of new physics. In this talk, I will describe how the development of electron microscopy has contributed the study of topological defects in mesoscopic and complex crystals. Two examples will be highlighted, one is vortices in ferroelectric crystals and the other is dislocation dynamics in high entropy alloys.


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