Electronic correlations and topology across Tc in a magnetic Weyl semimetal - Livestream

Co3Sn2S2 is a magnetic Weyl semimetal below its Curie temperature (Tc) of 177K. I will discuss our recent spatial and temperature-dependent angle-resolved photoemission spectroscopy (ARPES) studies in this system.  Across Tc, we observe signatures of a topological phase transition, but also observe changes in bulk bands which are inconsistent with a simple lifting of exchange interactions, suggesting enhanced electronic correlations in the regime without long-range magnetic order.  I will also discuss spatial-dependent microARPES data which quantify the characteristic differences between Sn- and S- terminated surfaces.

Speaker: Inna Vishik, UC Davis

Attend in person or online. See weblink for Zoom information.