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arXiv · 1208.6266

Composite fermion state of spin-orbit coupled bosons

Tigran A. Sedrakyan·Alex Kamenev·Leonid I. Glazman
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Abstract

We consider spinor Bose gas with the isotropic Rashba spin-orbit coupling in 2D. We argue that at low density its groundstate is a composite fermion state with a Chern-Simons gauge field and filling factor one. The chemical potential of such a state scales with the density as \mu \propto n^{3/2}. This is a lower energy per particle than \mu \propto n for the earlier suggested groundstate candidates: a condensate with broken time-reversal symmetry and a spin density wave state.

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Tigran A. Sedrakyan, Alex Kamenev, Leonid I. Glazman. 2012-08-30. Composite fermion state of spin-orbit coupled bosons. https://doi.org/10.1103/physreva.86.063639

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