Electronic Correlations and Topology Across TC in a Magnetic Weyl Semimetal

Electronic Correlations and Topology Across TC
March 30, 2022
Monday, April 11, 2022

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