Proposed realization of itinerant ferromagnetism in optical lattices

作者：Shizhong Zhang, Hsiang-Hsuan Hung, Congjun Wu · 发表于：Physical Review A · 年份：2010 · DOI：10.1103/physreva.82.053618 · 被引用次数：90 · 研究领域：Cold Atom Physics and Bose-Einstein Condensates、Physics of Superconductivity and Magnetism、Topological Materials and Phenomena

We propose a scheme to realize the itinerant ferromagnetism of two-component cold fermionic atoms in the $p$-orbital bands in optical lattices. The band flatness in the two-dimensional honeycomb lattice dramatically amplifies the interaction effect, driving the ferromagnetic transition even with a relatively weak repulsive interaction. This scheme has the advantage that the stability of the system can be maintained without causing decay to the molecular state as one approaches the Feshbach resonance from the side with the positive scattering length. Experimental signatures and detections are also discussed.