Quantum many-body approach to orbital magnetization

Orbital magnetization originates from the orbital motion of electrons in a crystalline solids without time-reversal symmetry, and can be measured and imaged experimentally. While the theory of orbital magnetism in noninteracting systems have been developed for more than a decade, a full quantum approach applying to general correlated electron systems is still lacking. We introduce a new quantum many-body approach to compute orbital magnetization for general interacting systems, and discuss its application to time-reversal symmetry broken Fermi liquids and narrow band systems.