SKM 2021 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 25: Poster Session: Topology
TT 25.5: Poster
Thursday, September 30, 2021, 13:30–16:00, P
Kerr effect in tilted nodal loop semimetals — Johan Esktröm1, Eddwi H. Hasdeo1,2, Maria Belén Farias1, and •Thomas L. Schmidt1 — 1Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg — 2Research Center for Physics, Indonesian Institute of Sciences, South Tangerang, Indonesia
We investigate the optical activity of tilted nodal loop semimetals. We calculate the full conductivity matrix for a band structure containing a nodal loop with possible tilt in the x−y plane, which allows us to study the Kerr rotation and ellipticity both for a thin film and a bulk material. We find signatures in the Kerr signal that give direct information about the tilt velocity and direction, the radius of the nodal loop and the internal chemical potential of the system. These findings should serve as a guide to understanding optical measurements of nodal loop semimetals and as an additional tool to characterize them.