Ferromagnetic phase transition and Bose-Einstein condensation in spinor Bose gases

Abstract

Phase transitions in spinor Bose gases with ferromagnetic (FM) couplings are studied via mean-field theory. We show that an infinitesimal value of the coupling can induce a FM phase transition at a finite temperature always above the critical temperature of Bose-Einstein condensation. This contrasts sharply with the case of Fermi gases, in which the Stoner coupling $I_s$ can not lead to a FM phase transition unless it is larger than a threshold value $I_0$. The FM coupling also increases the critical temperatures of both the ferromagnetic transition and the Bose-Einstein condensation.

4 pages, 4 figures

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Cited by in corpus (27)

• Spinor Bose-Einstein condensates
• Quantum phases of dipolar spinor condensates
• Dipolar and spinor bosonic systems
• Bose-Einstein condensation of trapped interacting spin-1 atoms
• Spin waves in a Bose Ferromagnet
• Coherent dynamics of domain formation in the Bose Ferromagnet
• Pairing, Ferromagnetism, and Condensation of a normal spin-1 Bose gas
• Superfluid vs Ferromagnetic Behaviour in a Bose Gas of Spin-1/2 Atoms
• Ground-state phase diagram and critical temperature of two-component Bose gases with Rashba spin-orbit coupling
• Static properties and spin dynamics of the ferromagnetic spin-1 Bose gas in magnetic field
• Three fluid hydrodynamics of spin-1 Bose-Einstein condensates
• Thermodynamic properties of the itinerant-boson ferromagnet
• Phases of a polar spin-1 Bose gas in a magnetic field
• Enhancement of ferromagnetism by p-wave Cooper pairing in superconducting ferromagnets
• Competition between paramagnetism and diamagnetism in charged Fermi gases
• Superfluidity and spin superfluidity in spinor Bose gases
• Berezinskii-Kosterlitz-Thouless transitions in an easy-plane ferromagnetic superfluid
• Magnetic properties of charged spin-1 Bose gases with ferromagnetic coupling
• Spontaneous separation of two-component Fermi gases in a double-well trap
• The weakening of fermionization of one dimensional spinor Bose gases induced by spin-exchange interaction
• Ground State Properties of Anti-Ferromagnetic Spinor Bose gases in One Dimension
• Phase separation in the trapped spinor gases with anisotropic spin-spin interaction
• Renormalization group approach to the spin-1 Bose gas
• Reentrance of Bose-Einstein condensation in spinor atomic gases in magnetic field
• Phase-imprint induced domain formations and spin dynamics in spinor condensates
• Continuous-wave solutions and modulational instability in spinor condensates of positronium
• Magnetic properties of spin-1/2 Fermi gases with ferromagnetic interaction