Sonderseminare TRR80

11.10.2018 16:15, Raum: S-288
Prof. Dr. Hiroshi Yasuoka (Max-Planck-Institut für chemische Physik fester Stoffe, Dresden)
Weyl fermion excitations in transition metal pnictides explored by 93Nb NMR and 181Ta NQR
30.10.2018 16:00, Raum: S-288
Prof. Dr. Markus J. Aichhorn (TU Graz)
Strong Correlations and Spin-Orbit Coupling: Models and Materials
17.1.2019 14:30, Raum: S-403
Prof. Dr. Sándor Bordács (BUTE, Budapest)
Detection of antiferromagnetic domains by optical magnetoelectric effect

One of the main motivation behind the current interest in multiferroics is that they can be building blocks of low-energy consumption nonvolatile memory devices. In this talk, I will demonstrate that simple optical absorption spectroscopy can be used to identify magnetoelectric (ME) antiferromagnetic (AFM) domains of LiCoPO4. In case of the THz spin-wave excitations this unusual contrast arising from the optical magnetoelectric effect as confirmed by our microscopic model, which also captures the characteristics of the observed static ME effect. Since these domains and the absorption difference are also present in zero magnetic field it may promote the development of ME memory devices based on AFM insulators.

29.1.2019 16:00, Raum: S-288
Dr. Maia G. Vergniory (Donostia International Physics Center, Ikerbasque)
Higher Order Topological Insulators from Elementary Band Representations Theory