DCN Seminar

Dr. Maximilian Thomas Birch
Special Postdoctoral Researcher
Strong Correlation Quantum Transport Research Team
RIKEN Center for Emergent Matter Science, Japan

Abstract
Focused ion beam (FIB) fabrication methods enable precise nanoscale devices to be fashioned from high-quality single crystalline materials, ideal for exploring nonlinear transport phenomena or transmission imaging studies. In this talk, first I will detail and explain the methodology and rationale behind the various FIB devices we have utilised to investigate emergent functionality in a wide range of quantum materials. I will then highlight our 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, we observe large nonreciprocal transport, resulting in a switchable diode effect. Finally, I will detail recent results on the x-ray microscopy imaging of octupole domains in FIB devices of the time-reversal symmetry breaking, noncollinear antiferromagnetic Mn3Sn.

Biography
Max undertook his PhD at Durham University, supervised by Prof. Peter Hatton, focusing on magnetic skyrmions. His first postdoc was at the Max Planck Institute for Intelligent Systems in Stuttgart, under director Gisela Schütz, where he studied 2D van der Waals magnets. After securing a RIKEN 'special postdoctoral researcher' fellowship, he moved to the Center for Emergent Matter Science in Japan under Prof. Tokura, where he has been developing novel FIB devices for nonlinear transport measurements.

Zoom
https://tu-dresden.zoom-x.de/j/87264138030?pwd=WG41dkN6L0NOaXFaaVRORzM3QmdFQT09