Abstract
We study two-component ultracold fermions with repulsive interactions, which are loaded into a decorated square lattice. By combining the real-space dynamical mean-field theory with the numerical renormalization group method, we discuss magnetic properties in the system. It is clarified how the ferromagnetically ordered ground state, which is stabilized by a flat band mechanism, is adiabatically connected to the ferrimagnetically ordered state expected in the strong coupling limit.
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Noda, K., Koga, A., Kawakami, N. et al. Magnetically Ordered State of Cold Fermions on a Decorated Square Lattice. J Low Temp Phys 158, 79–84 (2010). https://doi.org/10.1007/s10909-009-0042-5
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DOI: https://doi.org/10.1007/s10909-009-0042-5