Crystalline phase of strongly interacting Fermi mixtures

Abstract

We show that the system of weakly bound molecules of heavy and light fermionic atoms is characterized by a long-range intermolecular repulsion and can undergo a gas-crystal quantum transition if the mass ratio exceeds a critical value. For the critical mass ratio above 100 obtained in our calculations, this crystalline order can be observed as a superlattice in an optical lattice for heavy atoms with a small filling factor. We also find that this novel system is sufficiently stable with respect to molecular relaxation into deep bound states and to the process of trimer formation.

4 pages, 1 color figure, published version

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• Observation of a two-dimensional Fermi gas of atoms
• General relations for quantum gases in two and three dimensions. Two-component fermions
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Quantum degenerate mixtures of alkali and alkaline-earth-like atoms
• Quantum degenerate mixtures of strontium and rubidium atoms
• Cold Atoms and Molecules in Self-Assembled Dipolar Lattices
• Collisional Stability of 40K Immersed in a Strongly Interacting Fermi Gas of 6Li
• Broad Feshbach resonance in the 6Li-40K mixture
• Atom-dimer scattering and long-lived trimers in fermionic mixtures
• Four-body Efimov effect
• Feshbach resonances in mixtures of ultracold ${}^6$Li and ${}^{87}$Rb gases
• Atom-dimer and dimer-dimer scattering in fermionic mixtures near a narrow Feshbach resonance
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• All-optical production of a degenerate mixture of 6Li and 40K and creation of heteronuclear molecules
• Feshbach resonances in the 6Li-40K Fermi-Fermi mixture: Elastic versus inelastic interactions
• Observation of a Strong Atom-Dimer Attraction in a Mass-Imbalanced Fermi-Fermi Mixture
• Universal 1+2-body bound states in planar atomic wave guides
• Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
• Collisional properties of weakly bound heteronuclear dimers
• Large atom number dual-species magneto-optical trap for fermionic 6Li and 40K atoms
• Isotropic contact forces in arbitrary representation: heterogeneous few-body problems and low dimensions
• Casimir interaction among heavy fermions in the BCS-BEC crossover
• Confinement-induced Efimov resonances in Fermi-Fermi mixtures
• Trimer liquids and crystals of polar molecules in coupled wires
• Trimers in the resonant 2+1 fermionic problem on a narrow Feshbach resonance : Crossover from Efimovian to Hydrogenoid spectrum
• Born-Oppenheimer study of two-component few-particle systems under one-dimensional confinement
• Dimer, trimer and FFLO liquids in mass- and spin-imbalanced trapped binary mixtures in one dimension
• Crossover in the Efimov spectrum
• Resonance Scattering in Optical Lattices and Molecules: Interband versus Intraband Effects
• Structure and melting behavior of classical bilayer crystals of dipoles
• Realization of a Cold Mixture of Fermionic Chromium and Lithium Atoms
• Three-body problem in a two-dimensional Fermi gas
• Two-element Zeeman Slower for Rubidium and Lithium
• Anomalous Dimers in Quantum Mixtures near Broad Resonances: Pauli Blocking, Fermi Surface Dynamics and Implications
• Double Degenerate Bose-Fermi Mixture of Strontium and Lithium
• Feshbach-optimized photoassociation of ultracold ${}^6$Li${}^{87}$Rb molecules with short pulses
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• Formation of deeply bound ultracold LiRb molecules via photoassociation near the Li 2S${}_{1/2}$ + Rb 5P${}_{3/2}$ asymptote
• Application of lasers to ultracold atoms and molecules
• Atomic lattice excitons: from condensates to crystals
• Stable Heteronuclear Few-Atom Bound States in Mixed Dimensions
• Optical lattices with large scattering length: Using few-body physics to simulate an electron-phonon system
• The demixing of the two-component fermions in optical lattices under a spin-dependent external potential
• Slow-light probe of Fermi pairing through an atom-molecule dark state
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• Path-integral Monte Carlo simulation of time-reversal noninvariant bulk systems with a case study of rotating Yukawa gases
• Molecular regimes in ultracold Fermi gases