Explore magnetism as an emergent phenomenon in this 34-minute APS March Meeting 2014 Fred Kavli Special Symposium talk by Yoshinori Tokura from RIKEN Center for Emergent Matter Science. Delve into spin-orbital superstructures, colossal magnetoresistance, and phase control of correlated electrons. Examine transverse spiral spin structures and their role in ferroelectricity, as well as spin state variables in magneto-electric coupling. Investigate scalar spin chirality, magnetic skyrmions, and their various forms in B20-type crystals. Learn about helical spin orders, real space observations of skyrmion crystals, and H-T phase diagrams. Discover the concept of magnetic topological insulators and the quantum anomalous Hall effect. Gain insights into emergent electromagnetism and its implications for advanced materials and technologies.
Overview
Syllabus
Magnetism as the emergent phenomena
Spin-orbital superstructures
Case of Colossal Magnetoresistance (CMR)
Bicrticality enhances the response.
Phase Control of Correlated Electrons
Transverse spiral spin structure produces ferroelectricity
Polarization reversal upon magnetization reversel
Spin State variables to host magneto-electric coupling
Scalar Spin Chirality
Field reversal of spin chirality
What is magnetic skyrmion?
Helical spin order in B20-type crystals
Smal angle neutron scattering for Skyrmion Xtal
Real Space Observation of Skymion crystal
H-T Phase diagram
Skyrmion crystal and liquid, 2D and 3D form?
Magnetic Topological Insulator
Discovery of Quantum Anomalous Hall Effect
Emergent Electromagnetism
Taught by
APS Physics
