Topological magnon bands and effective Hamiltonians for periodically driven systems

Date

Dec 5, 2018

Time

11:00 AM - 12:00 PM

Speaker

Prof. Gregory A. Fiete

Affiliation

University of Texas at Austin, USA

Language

en

Main Topic

Physik

Other Topics

Physik

Host

Prof. Dr. A. P. Mackenzie

Description

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

Last modified: Dec 6, 2018, 1:05:24 AM