Phase separations induced by a trapping potential in one-dimensional fermionic systems as a source of core-shell structures
arXiv:1903.08050 · doi:10.1038/s41598-019-42044-w
Abstract
Ultracold fermionic gases in optical lattices give a great opportunity for creating different types of novel states. One of them is phase separation induced by a trapping potential between different types of superfluid phases. The core-shell structures, occurring in systems with a trapping potential, are a good example of such separations. The types and the sequences of phases which emerge in such structures can depend on spin-imbalance, shape of the trap and on-site interaction strength. In this work, we investigate the properties of such structures within an attractive Fermi gas loaded in the optical lattice, in the presence of the trapping potential and their relations to the phase diagram of the homogeneous system. Moreover, we show how external and internal parameters of the system and parameters of the trap influence their properties. In particular, we show a possible occurrence of the core-shell structure in a system with a harmonic trap, containing the BCS and FFLO states. Additionally, we find a spatial separation of two superfuild states in the system, one in the BCS limit as well as the other one in the tightly bound local pairs (BEC) regime.
6 figures, 11 pages
References in corpus (56)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Quantum Simulation
- Theory of ultracold Fermi gases
- A Mott insulator of fermionic atoms in an optical lattice
- Vortices and Superfluidity in a Strongly Interacting Fermi Gas
- Pairing and Phase Separation in a Polarized Fermi Gas
- Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
- Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
- Experimental realization of a long-range antiferromagnet in the Hubbard model with ultracold atoms
- Inhomogeneous Superconductivity in Condensed Matter and QCD
- Fermionic atoms in a 3D optical lattice: Observing Fermi-surfaces, dynamics and interactions
- Fermi gases in one dimension: From Bethe Ansatz to experiments
- Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
- Observation of antiferromagnetic correlations in the Hubbard model with ultracold atoms
- Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
- Interior Gap Superfluidity
- Non-standard Hubbard models in optical lattices: a review
- Observation of Spatial Charge and Spin Correlations in the 2D Fermi-Hubbard Model
- BEC-BCS crossover in "magnetized" Feshbach-resonantly paired superfluids
- Molecules of Fermionic Atoms in an Optical Lattice
- Deformation of a Trapped Fermi Gas with Unequal Spin Populations
- Normal state of a polarized Fermi gas at unitarity
- Attractive Fermi gases with unequal spin populations in highly elongated traps
- Phase diagram of a strongly interacting polarized Fermi gas in one dimension
- Imbalanced Feshbach-resonant Fermi gases
- Phase separation in a polarized Fermi gas at zero temperature
- Quantitative Determination of Temperature in the Approach to Magnetic Order of Ultracold Fermions in an Optical Lattice
- The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
- Phase Transitions and Pairing Signature in Strongly Attractive Fermi Atomic Gases
- Exploring the ferromagnetic behaviour of a repulsive Fermi gas via spin dynamics
- Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional spin-polarized ultracold atomic Fermi gases
- Generic Phase Diagram of Fermion Superfluids with Population Imbalance
- Observation of 2D fermionic Mott insulators of K with single-site resolution
- Detecting antiferromagnetism of atoms in an optical lattice via optical Bragg scattering
- Phase separation frustrated by the long range Coulomb interaction I: Theory
- Formation and dynamics of anti-ferromagnetic correlations in tunable optical lattices
- Large Range of Stability of Larkin-Ovchinnikov States for Imbalanced Fermi Gases in Optical Lattices
- FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
- Finite temperature phase diagram of a spin-polarized ultracold Fermi gas in a highly elongated harmonic trap
- Non-standard pairing in asymmetric trapped Fermi gases
- Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices
- Phase separation of trapped spin-imbalanced Fermi gases in one-dimensional optical lattices
- Stable Fulde-Ferrell-Larkin-Ovchinnikov pairing states in 2D and 3D optical lattices
- Phase separation frustrated by the long range Coulomb interaction II: Applications
- Phase separation in a lattice model of a superconductor with pair hopping
- Mesoscopic Phase Separation in Anisotropic Superconductors
- The ab initio study of unconventional superconductivity in CeCoIn and FeSe
- Critical behaviour in one dimension: unconventional pairing, phase separation, BEC-BCS crossover and magnetic Lifshitz transition
- Population imbalanced fermions in harmonically trapped optical lattices
- Diversity of charge orderings in correlated systems
- Density profiles of polarized Fermi gases confined in harmonic traps
- Lattice structures of Larkin-Ovchinnikov-Fulde - Ferrell (LOFF) state
- Phase separation of superconducting phases in the Penson-Kolb-Hubbard model
- Antiferromagnetic order in the FFLO state
- Phase transitions in quasi-one dimensional system with unconventional superconductivity