Magnetic phases of mass- and population-imbalanced ultracold fermionic mixtures in optical lattices

Abstract

We study magnetic phases of two-component mixtures of ultracold fermions with repulsive interactions in optical lattices in the presence of both hopping and population imbalance by means of dynamical mean-field theory (DMFT). It is shown that these mixtures can have easy-axis antiferromagnetic, ferrimagnetic, charge-density wave, and canted-antiferromagnetic order or be unordered depending on parameters of the system. We study the resulting phase diagram in detail and investigate the stability of the different phases with respect to thermal fluctuations. We also perform a quantitative analysis for a gas confined in a harmonic trap, both within the local density approximation and using a full real-space generalization of DMFT.

9 pages, 6 figures, published version

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Cited by in corpus (14)

• Creating State-Dependent Lattices for Ultracold Fermions by Magnetic Gradient Modulation
• Two-flavor mixture of a few fermions of different mass in a one-dimensional harmonic trap
• Magnetic ordering of three-component ultracold fermionic mixtures in optical lattices
• Cooling through quantum criticality and many-body effects in condensed matter and cold gases
• Critical entropies and magnetic-phase-diagram analysis of ultracold three-component fermionic mixtures in optical lattices
• Realization of a Cold Mixture of Fermionic Chromium and Lithium Atoms
• Zero-Temperature Equation of State and Phase Diagram of Repulsive Fermionic Mixtures
• Double-degenerate Fermi mixtures of ${}^6$Li and ${}^{53}$Cr atoms
• SU(4)-symmetric Hubbard model at quarter filling: Insights from the dynamical mean-field approach
• Effects of anisotropy in simple lattice geometries on many-body properties of ultracold fermions in optical lattices
• Spin-imbalance-induced transverse magnetization in the Hofstadter-Hubbard model
• Perspectives of optical lattices with state-dependent tunneling in approaching quantum magnetism in the presence of the external harmonic trapping potential
• Itinerant ferromagnetism in an SU(3) Fermi-Hubbard model at finite temperatures: A dynamical mean-field theory study
• Generalized Nagaoka ferromagnetism accompanied by flavor-selective Mott states in an SU($N$) Fermi-Hubbard model