Regensburg 2019 – wissenschaftliches Programm

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SYGT: Symposium Geometry, Topology, and Condensed Matter

SYGT 1: Geometry, topology, and condensed matter

SYGT 1.2: Hauptvortrag

Dienstag, 2. April 2019, 10:00–10:30, H1

Curvature-induced effects in nanomagnets — •Denis Sheka — Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

The interplay between geometry and topology is of fundamental importance throughout many disciplines. In this respect, the investigation of physical effects governing the responses of curved magnetic nanoobjects to electric and magnetic fields is of strong fundamental interest but is also technologically appealing. Owing to intense theoretical and experimental efforts, the topic of magnetism in curved geometries has evolved in an independent research field of modern magnetism with many exciting theoretical predictions and strong application potential.

This talk focuses on the peculiarities emerging from geometrically curved magnetic objects, including three-dimensional bent wires and curved shells. The curvilinear geometry manifests itself in emergent anisotropy and chiral interactions. These curvature-induced interactions can be not only local (when they stem from the exchange energy) but also non-local (when they are due to magnetostatics). As a consequence, family of novel curvature-driven effects emerges, which includes magnetochiral effects and topologically induced magnetization patterning, resulting in theoretically predicted unlimited domain wall velocities, chirality symmetry breaking etc.