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Prof. Robert StampsUniversity of Manitoba
I will discuss unusual features associated with chiral interactions and geometries that lead to chiral ordering. I will begin with some comments on new possibilities of probing chirality in crystals using a type of electronic vortex state. Electrons in these states carry spin and angular momentum, and have potential for use in electron microscopy as new types of probes. The central theme of the talk will be chirality and dynamics in materials of interest for their skyrmionic and helicoidal textures, the possibility of chiral symmetry breaking in artificially designed structures, and prospects for application to magnonics and bio-inspired computing. C. Greenshields, et al., ‘Is Angular Momentum Conserved in Electron Vortex Beams? Phys. Rev. Lett. 113 (2014). J.-V. Kim, R. L. Stamps, and R. E. Camley, ‘Spin wave power flow and caustics in ultrathin ferromagnets with the Dzyaloshinskii-Moriya interaction’, Phys. Rev. Lett. 117 (2016). A. O. Leonov et al., ‘Chiral Surface Twists and Skyrmion Stability in Nanolayers of Cubic Helimagnets’, Phys. Rev. Lett. 117 (2016). L. J. Heyderman and R. L. Stamps, ‘Artificial ferroic systems: novel functionality from structure, interactions and dynamics’, J. of Phys.: Condensed Matter 25 (2013). Z. Budrikis, P. Politi, and R. L. Stamps, ‘A network model for field and quenched disorder effects in artificial spin ice’, New J. Phys. 14 (2012). R. L. Stamps, ‘Artificial spin ice: The unhappy wanderer’, Nature Phys. 10 (2014).
Robert Stamps is Professor and Head of the Department Physics and Astronomy in the Faculty of Science at the University of Manitoba. He has published over 250 papers on a range of topics in condensed matter physics including linear and nonlinear dynamics of magnetic and ferroelectric nanostructures, frustrated spin systems and glasses, inelastic light scattering and ferromagnetic resonance, spin electronics, and spin dynamics in constrained geometries. Before joining the University of Manitoba, he led the Materials and Condensed Matter Physics Group at the University of Glasgow. Dr Stamps was a Humbolt Fellow at RWTH Aachen, an Australian Professorial Fellow and Winthrop Professor at the University of Western Australia, and has held several visiting fellowships in France and Italy. He is an elected Fellow of the Royal Society of Edinburgh and Institute of Physics. He was the 2004 IOP/IEEE Wohlfarth Lecturer, and an IEEE Magnetics Society Distinguished Lecturer in 2008.