Join us for the Physics Condensed Matter Seminar at 2:30 pm
Title: Electronic correlations and topology across Tc in a magnetic Weyl semimetal
Abstract: 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.
Ref: Rossi, Ivanov, et al, PRB 104, 155115 (2021)
Join Zoom Meeting https://berkeley.zoom.us/j/99982021890?pwd=OTMyd3cwMGp5Tk9QTW1vNk9EMDJNZz09
Meeting ID: 999 8202 1890 Passcode: 954439
Location: 3 Physics North
Speaker: Inna Vishik
Affiliation: UC Davis