Calendar of Events
Topological magnon bands and periodically driven magnetic systems
Speaker: Greg Fiete (Northeastern University)
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 [1,2]. In the second part of the talk, I will turn to periodically driven magnetic systems and discuss how selective phonon excitations may be used to change the magnetic Hamiltonian [3,4].
 Pontus Laurell and Gregory A. Fiete, Phys. Rev. Lett. 118, 177201 (2017).
 Pontus Laurell and Gregory A. Fiete, Phys. Rev. B 98, 094419 (2018).
 M. Rodriguez-Vega, Ze-Xun Lin, A. Leonardo, A. Ernst, G. Chaudhary, M. G. Vergniory, and Gregory A. Fiete, Phys. Rev. B 102, 081117(R) (2020).
 Martin Rodriguez-Vega, A. Leonardo, and Gregory A. Fiete, Phys. Rev. B 102, 104102 (2020).
Host: Jak Chakhalian