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Sonderseminare TRR80


25.10.2017 16:00, Raum: R-242
Dr. Peter Milde (TU Dresden, Institute of Applied Physics, Dresden)
Scanning Force Microscopy Investigations of Skyrmions

In the past decade, a lot of interest was spurred by discoveries of vortex-like magnetic states, so-called skyrmions, in a variety of materials characterized by the anisotropic Dzyaloshinskii-Moriya (DM) interaction. Originally introduced in the context of pion fields, the expression skyrmion today is used in a more general sense as a term for a mathematical construct, that describes a topologically stabilized, particle-like object. The topological nature of the skyrmions gives rise to new and exciting physics, such as the so-called topological protection, i.e. an increased stability against the superparamagnetic effect, as well as the topological Hall-effect, or the Skyrmion Hall-effect. Real-space imaging of these objects, especially on single crystals, is readily achieved using magnetic force microscopy. We review our scanning force microscopy investigations of skyrmions in direction bulk-DMI single crystal materials, such as FexCo(1-x)Si (x = 0:5), GaV4S8 and Cu2OSeO3 and report on recent findings.

26.10.2017 14:00, Raum: S-254
Prof. Dr. Vasily Moshnyaga (Georg-August-Universität Göttingen, Germany)
Order / disorder phenomena in perovskite films
14.11.2017 16:00, Raum: S-288
Dr. Martin Hohenadler (Universität Würzburg)
Competing Orders in Luttinger and Dirac Liquids
15.11.2017 15:30, Raum: S-403
Dr. Dirk Wulferding (Institute for Condensed Matter Physics, TU Braunschweig and Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, POSTECH, Korea)
Magnetic force microscopy beyond imaging - from low energy condensed matter physics to high energy particle physics
28.11.2017 17:00, Raum: S-288
Prof. Dr. Björn Trauzettel (Universität Würzburg)
Chiral anomaly and fractional charges at the quantum spin Hall edge
30.11.2017 13:30, Raum: S-403
Dr. Leonid E. Svistov (P.L. Kapitza Institute for Physical Problems of Russian Academy of Sciences, Moscow)
Exotic phases in the triangular antiferromagnet CuCrO2
4.12.2017 12:15, Raum: S-439
Dr. Ivan Rungger (National Physics Laboratory, Teddington/London)
Beyond semi-local DFT corrections for nanoscale materials and device modelling
11.12.2017 15:45, Raum: S-288
Prof. Avinash Mahajan (Indian Institute of Technology Bombay, Mumbai)
Gapless spin liquid behaviour in the S = 1 honeycomb ruthenate Ag3LiRu2O6
23.1.2018 16:00, Raum: S-288
Dr. Achilleas Lazarides (Max-Planck-Institut für die Physik komplexer Systeme, Dresden)
Floquet many-body physics: Ensembles and order away from equilibrium
26.1.2018 10:00, Raum: S-403
Dr. Dávid Szaller (Institut für Festkörperphysik, TU Wien)
Exotic magnetoelectric excitations of the multiferroic SmFe3(BO3)4
30.1.2018 16:00, Raum: S-288
Dr. Andrés Cano (CNRS, Université Grenoble Alpes, Institut Néel, Grenoble and Department of Materials, ETH Zurich)
FeSi: A new building block for iron-based superconductivity
27.2.2018 14:00, Raum: S-288
Prof. Dr. Suichi Murakami (Tokyo Institute of Technology)
Topology and transport in inversion-asymmetric crystals