Friday, April 19, 2013

1304.5103 (Kira Riedl et al.)

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

Kira Riedl, Casper Drukier, Peter Zalom, Peter Kopietz
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.
View original: http://arxiv.org/abs/1304.5103

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