PGI-1 Talk: Peter Christian Schmitz

Quantum Theory of Materials Seminar

Spin-Orbital Textures and Curvature Fluxes in gapped and confined semimetals

Since about 2 years it is becoming more recognized that narrow-gap interaction manifolds in the Brillouin zone spectrum of semimetals are responsible for quantized contributions to their hall conductivity, and for its exchange between bands. We found that singularities in the Spin-Orbital texture, and in general points of symmetry breaking, can act as sources and vortices of associated Berry curvature, and studied its 3D flux. In this context, new phases such as Spin-Weyl- or Feature- or Orbital-Chern Topological Insulators have been described by the community.
Since the structures are often confined by 2D or Van-der-Waals lattices, the projections and resonances of associated boundary states can create hidden or novel phases on their own, such as Hotspots and Spanning Fermi Arcs at the surface.
These findings are presented as a set of open questions, each connected with the likely expertise of certain members of the institute.

A common discussion is much appreciated

Contact

Prof. Dr. Yuriy Mokrousov
Phone: +49 2461 61-4434
Email: y.mokrousov@fz-juelich.de

Peter Christian Schmitz
RWTH-Aachen University
Email: peter.christian.schmitz@rwth-aachen.de