Topological magnon bands and effective Hamiltonians for periodically driven systems

Datum

05.12.2018

Zeit

11:00 - 12:00

Sprecher

Prof. Gregory A. Fiete

Zugehörigkeit

University of Texas at Austin, USA

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Host

Prof. Dr. A. P. Mackenzie

Beschreibung

The effect of spin-orbit coupling in condensed matter systems has received intense study over the past decade, most notably in the context of topological band insulators where electron-electron interactions are not essential for the topological properties. In this talk, I will focus on the opposite limit of strong electronic correlations with spin-orbit coupling. I will describe two different (materials motivated) two-dimensional models in which the spin-orbit coupling leads to topological band structure in the magnetic excitations. In the second part of the talk, I will turn to recent work describing an approach to achieving effective time-independent Hamiltonians for periodically driven, interacting many-particle systems. The method agrees with the Magnus expansion in the high frequency limit, but appears to also work well in the strong-driving, low-frequency limit.

Links

• MPI CPfS

Letztmalig verändert: 06.12.2018, 01:05:24