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MA: Fachverband Magnetismus

MA 18: Topological Defects in Magnetic Materials: from Devices to Cosmos
(PhD-Student Symposium jointly with jDPG)

MA 18.8: Topical Talk

Dienstag, 12. März 2013, 12:45–13:15, H16

Topological physics: from quantum Hall Skyrmions to optical Chern lattices — •Roderich Moessner — Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany

Topological physics as we understand it today started 30 years ago with the experimental discovery of the quantum Hall effects. Here, we discuss the physics of Skyrmions, spin textures in quantum Hall states exhibiting both conventional and topological forms of order in a delicately intertwined way: they combine, in a physically transparent way, fundamental concepts such as topological stability and Berry phase physics. We provide a detailed analysis of Skyrmion lattices for multicomponent quantum Hall systems, such as (bi)layer graphene or multi-valley semiconductors in a magnetic field. We also point out how these results can be used to inspire a robust design strategy for optical topological band structures for use in cold atomic systems.