Project Details
Projekt
Emergent electrodynamics of topological spin textures
Applicant
Professor Dr. Christian Pfleiderer
Subject Area
Experimental Condensed Matter Physics
Term
since 2018
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 403191981
The non-trivial topological winding of the magnetization in skyrmions and related topological spin textures gives rise to an extremely efficient coupling with spin currents, that may be elegantly described in terms of an emergent electrodynamics. The underlying emergent magnetic and electric fields give rise to a topological Hall effect and, in the presence of spin transfer torque (STT) induced flow of the spin textures, an emergent electric field. We propose to perform comprehensive studies of the emergent electrodynamics in STT driven topological spin textures in selected bulk materials, focusing on the creation, motion and decay of topological spin textures under various conditions. The proposed studies combine transport and thermodynamic information obtained by means of a new generation of laboratory-based techniques with microscopic information obtained by means of a new generation of neutron and x-ray scattering techniques. The former includes ac susceptibility and magnetometry under STTs, high-resolution torque magnetometry, and electrical transport properties under oscillating magnetic fields and STTs, whereas the latter concern ultra-high-resolution neutron spectroscopy, as well as kinetic small angle neutron scattering (SANS), kinetic gracing incidence small angle neutron scattering (GISANS) and resonant elastic x-ray scattering (REXS).
DFG Programme
Priority Programmes
