Exotic magnetic order in the orbital-selective Mott regime of multiorbital systems

摘要

The orbital-selective Mott phase (OSMP) of multiorbital Hubbard models hasbeen extensively analyzed before using static and dynamical mean-fieldapproximations. In parallel, the properties of Block states(antiferromagnetically coupled ferromagnetic spin clusters) in Fe-basedsuperconductors have also been much discussed. The present effort usesnumerically exact techniques in one-dimensional systems to report theobservation of Block states within the OSMP regime, connecting two seeminglyindependent areas of research, and providing analogies with the physics ofDouble-Exchange models.