Quantum Anomalous Hall Phases in Layered Magnetic Oxides Predicted by First-Principles Density Functional Calculations

Quantum anomalous Hall (QAH) phase is a two-dimensional bulk ferromagnetic insulator with a nonzero Chern number usually in presence of spin-orbit coupling (SOC). Associated metallic chiral edge states carry dissipationless current transport in electronic devices. Due to its intriguing nontrivial topological properties and great potential application for designing dissipationless spintronics, extensive theoretical and experimental studies have been made to search for real materials to host such QAHE. Indeed, this intriguing QAH phase has recently been observed in magnetic impurity-doped topological insulators, albeit, at extremely low temperatures [1].