| Description: | [DPS Seminar] Prof. Arun Paramekanti (University of Toronto, Canada) -- Topology in Magnets -::~::- Join: https://meet.google.com/dfs-vguy-czr -::~::- |
| Date: | Wednesday, Feb 23, 2022 |
| Time: | 7:30 p.m. - 8:30 p.m. |
| Details: | Topology plays an important role in many new phases discovered incondensed matter systems. In this talk, I will discuss two aspects of topology inmagnetism of solids. Momentum space topology is important in understanding spin waves in ordered magnets or triplons in quantum paramagnets, and they can realize unusual Chern bands or higher order topological states with corner modes. I will discuss examples of honeycomb magnets where such physics plays a role. Real space topology enters in the characterization of magnetic spin textures such as skyrmions and skyrmion crystals. I will discuss how skyrmions impart nontrivial real space Berry phases leading to Hofstadter bands and how their signature may be indirectly seen in transport and optical probes. Time permitting, I will touch upon how quantum melting of skyrmion crystals could potentially stabilize unusual chiral quantum spin liquids with anyon excitations. |
| URL: | https://meet.google.com/dfs-vguy-czr |
| Calendar: | Seminar Calendar (entered by rajni) |