Dr. Paul McClarty

Max Planck Institute for the Physics of Complex Systems

Dresden, Germany

Host: Kaul

Title: Topological Magnons

Abstract: Coherent magnetic excitations can have nontrivial topological features. In this talk, I'll give examples of "gapped" and "gapless" band topology of magnons including Kitaev-Heisenberg honeycomb models as analogues of Chern insulators and Dirac nodal lines in CoTiO3. Then I'll talk about features of band topology that are special to magnon systems: (i) the robustness of topological edge states in the presence of interactions; (ii) the visualization of spin-momentum locking in neutron scattering; (iii) the non-Hermitian topology of spontaneous magnon decay.