Guest Talk: Max Birch "Emergent phenomena in nanosculpted devices of quantum materials"

This Friday's guest talk was presented by Dr. Thomas Maximilian Birch of Riken Center for Emergent Matter (Japan). Hosted by TU Dresden's Dresden Center for Nanoanalysis and its director Bernd Rellinghaus, Max detailed and explained the methodology and rationale behind the various focused ion beam (FIB) devices he has utilized to investigate emergent functionality in a wide range of quantum materials. He then highlighted the development of the FIB fabrication of three-dimensional nanostructures, in the form of helical-shaped devices of the high-mobility Weyl magnet CoSn2S2. By breaking inversion symmetry on the length scale of the electron mean free path, Max' team observed large nonreciprocal transport, resulting in a switchable diode effect. Finally, Max detailed recent results on the x-ray microscopy imaging of octupole domains in FIB devices of the time-reversal symmetry breaking, noncollinear antiferromagnetic Mn3Sn.