Spontaneous ferromagnetism in the spinor Bose gas with Rashba spin-orbit coupling

Abstract

We show that in the two-component Bose gas with Rashba spin-orbit coupling an arbitrarily small attractive interaction between bosons with opposite spin induces spontaneous ferromagnetism below a finite critical temperature $T_c$. In the ferromagnetic phase the single-particle spectrum exhibits a unique minimum in momentum space in the direction of the magnetization. For sufficiently small temperatures below $T_c$ the bosons eventually condense into the unique state at the bottom of the spectrum, forming a ferromagnetic Bose-Einstein condensate.

14 pages, 8 figures

References in corpus (12)

• Spin-Orbit Coupled Spinor Bose-Einstein Condensates
• A Bose-Einstein Condensate in a Uniform Light-induced Vector Potential
• Spin-orbit coupled Bose-Einstein condensates
• Superstripes and the excitation spectrum of a spin-orbit-coupled Bose-Einstein condensate
• Stability of ultracold atomic Bose condensates with Rashba spin-orbit coupling against quantum and thermal fluctuations
• Composite fermion state of spin-orbit coupled bosons
• Fate of a Bose-Einstein Condensate in the Presence of Spin-Orbit Coupling
• Enhancement of condensate depletion due to spin-orbit coupling
• Condensation transition of ultracold Bose gases with Rashba spin-orbit coupling
• Ground State Properties of Spin-Orbit Coupled Bose Gases for Arbitrary Interactions
• Ground-state phase diagram and critical temperature of two-component Bose gases with Rashba spin-orbit coupling
• Scratching the Bose surface

Cited by in corpus (7)

• Phase separation in a spin-orbit coupled Bose-Einstein condensate
• Thermal Phase Transitions of Strongly Correlated Bosons with Spin-Orbit Coupling
• Spontaneous symmetry breaking in a spin-orbit coupled $f=2$ spinor condensate
• Stoner ferromagnetism in a thermal pseudospin-1/2 Bose gas
• Vortices and vortex states in Rashba spin-orbit-coupled condensates
• From antiferromagnetic order to magnetic textures in the two dimensional Fermi Hubbard model with synthetic spin orbit interaction
• $SU(3)$ Topological Insulators in the Honeycomb Lattice