Ferromagnetism in a Repulsive Atomic Fermi Gas with Correlated Disorder
arXiv:1604.01052 · doi:10.1103/PhysRevA.93.051604
Abstract
We investigate the zero-temperature ferromagnetic behavior of a two-component repulsive Fermi gas in the presence of a correlated random field that represents an optical speckle pattern. The density is tuned so that the (noninteracting) Fermi energy is close to the mobility edge of the Anderson localization transition. We employ quantum Monte Carlo simulations to determine various ground-state properties, including the equation of state, the magnetic susceptibility, and the energy of an impurity immersed in a polarized Fermi gas (repulsive polaron). In the weakly interacting limit, the magnetic susceptibility is found to be suppressed by disorder. However, it rapidly increases with the interaction strength, and it diverges at a much weaker interaction strength compared to the clean gas. Both the transition from the paramagnetic phase to the partially ferromagnetic phase, and the one from the partially to the fully ferromagnetic phase are strongly favored by disorder, indicating a case of order induced by disorder.
arXiv comment5+1 pages, 5 figures
References in corpus (35)
- Feshbach Resonances in Ultracold Gases
- Anderson localization of a non-interacting Bose-Einstein condensate
- Direct observation of Anderson localization of matter-waves in a controlled disorder
- Solutions of the Two Dimensional Hubbard Model: Benchmarks and Results from a Wide Range of Numerical Algorithms
- Three-dimensional localization of ultracold atoms in an optical disordered potential
- Three-Dimensional Anderson Localization of Ultracold Matter
- Disordered quantum gases under control
- Twist-averaged Boundary Conditions in Continuum Quantum Monte Carlo
- Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
- Delocalization of a disordered bosonic system by repulsive interactions
- Disorder-induced Localization in a Strongly Correlated Atomic Hubbard Gas
- First order transitions and multicritical points in weak itinerant ferromagnets
- Measurement of the mobility edge for 3D Anderson localization
- Mott--Hubbard transition vs. Anderson localization of correlated, disordered electrons
- Fractal superconductivity near localization threshold
- Experimental study of the transport of coherent interacting matter-waves in a 1D random potential induced by laser speckle
- Inhomogeneous phase formation on the border of itinerant ferromagnetism
- Itinerant ferromagnetism of a repulsive atomic Fermi gas: a quantum Monte Carlo study
- Correlations and Pair Formation in a Repulsively Interacting Fermi Gas
- Stability of a Fully Magnetized Ferromagnetic state in Repulsively Interacting Ultracold Fermi Gases
- Mobility edge for cold atoms in laser speckle potentials
- Atomic Fermi-Bose mixtures in inhomogeneous and random lattices: From Fermi glass to quantum spin glass and quantum percolation
- A new quantum phase between the Fermi glass and the Wigner crystal in two dimensions
- Collective dynamics and expansion of a Bose-Einstein condensate in a random potential
- Spin fluctuations, susceptibility and the dipole oscillation of a nearly ferromagnetic Fermi gas
- Three-Dimensional Anderson Localization in Variable Scale Disorder
- Compressibility of an Ultracold Fermi Gas with Repulsive Interactions
- Ferromagnetism of a Repulsive Atomic Fermi Gas in an Optical Lattice: a Quantum Monte Carlo Study
- The itinerant ferromagnetic phase of the Hubbard model
- Nonperturbative Effects on the Ferromagnetic Transition in Repulsive Fermi Gases
- Direct Observation of Fragmentation in a Disordered, Strongly Interacting Fermi Gas
- Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model
- Ferromagnetic transition of a two-component Fermi gas of Hard Spheres
- Anderson localization in optical lattices with correlated disorder
- Finite range and upper branch effects on itinerant ferromagnetism in repulsive Fermi gases: Bethe-Goldstone ladder resummation approach
Cited by in corpus (4)
- Exploring the ferromagnetic behaviour of a repulsive Fermi gas via spin dynamics
- Quantum Monte Carlo simulations of two-dimensional repulsive Fermi gases with population imbalance
- The impact of speckle disorder on a superfluid Fermi system
- Itinerant ferromagnetism in the repulsive Hubbard chain with anisotropic odd-wave attraction