Muon spin rotation insight into the topological kagome magnets and superconductors

Abstract:

The most intriguing properties of quantum materials are, arguably, unconventional forms of magnetism as well as superconductivity on the one hand and phenomena arising from topological electronic band structures on the other. But even if topological materials rank among the most actively studied systems in condensed matter physics over the past decade, materials in which the interplay between band topology and correlation can be studied experimentally remain rare. One class of systems that is currently emerging as a platform for such studies are so-called kagome magnets based on transition metals . It has been gradually realized that materials which host such special lattice structures can exhibit quantum diversity, ranging from spin-liquid phases, topological matter to intertwined orders.In this talk, I will make an introduction to the local-magnetic probe such as muon-spin rotation and present our recent results on unconventional magnetic and superconducting phases in a several novel topological kagome metals. The systems include Weyl semimetal Co3Sn2- xInxS2 , quantum-limit Chern magnet TbMn6Sn6, and the Z2 topological kagome superconductor (K,Rb)V3Sb5.

Bio:

Zurab did his PhD at the University of Zürich in 2014 doing Electron Paramagnetic Resonance and NMR. Then he was post doctoral research scientist for two years at the laboratory for muon spin spectroscopy, Switzerland, where he was co-responsible for high pressure muSR instrument. Then he was  post doctoral research scientist/fellow at the department of Physics of Columbia University for two years. He started his employment at Princeton University at the Laboratory for topological Quantum Matter and advanced spectroscopy. Soon after he got tenure track candidate position offer at PSI which he accepted and since 2018 he is responsible for high field muSR instrument at PSI. Since June 2022, his position at PSI is tenured as senior scientist.