Electrical Switching of Magnetic Order in Intrinsic Chern Insulators

Explore the fascinating world of intrinsic magnetic Chern insulators in this 55-minute lecture by Charles Tschirhart from PCS Institute for Basic Science. Delve into the electrical switching of magnetic order in moiré superlattice systems, including graphene and transition metal dichalcogenide heterostructures. Learn about the advantages of these systems over traditional magnetic Chern insulators, and discover how their intrinsic magnetism allows for electronic control. Examine two mechanisms for electronic switching of magnetization: topological contributions and intrinsic spin-orbit torques. Investigate these phenomena in twisted bilayer graphene, twisted monolayer/bilayer graphene, and AB-MoTe2/WSe2 through transport measurements and magnetic imaging using nanoSQUID microscopy. Gain insights into magnetic hysteresis loops, optical imaging, local probes, and anomalous Hall resistance. Understand the significance of first-order transitions and the Spin Hall Effect in these systems. Conclude with a summary of the observed phenomena and their implications for future technologies in the field of intrinsic Chern insulators.