We are very happy to have Dr. Kei Yamamoto from Kobe University as a visiting Postdoc. Kei has a cosmology and general relativity background and is currently working on his first project in the area of the spin Hall Effect. At the INSPIRE Group, Kei wants to intensify his research about condensed matter physics and antiferromagnets in particular. He is looking forward to making use of his mathematical skills in this new field at the interface between physics and mathematics.