Spin-orbit-coupling-induced magnetic heterostructure in the bilayer   Bose-Hubbard system
  We investigate magnetic phase in the bilayer system of ultra-cold bosons in an optical lattice, which is involved with Raman-induced spin-orbit (SO) coupling and laser-assisted interlayer tunneling. It is shown that there exit a rich of spin textures such as hetero ferromagnet, heterochiral magnet, chiral magnet with interlayer antiferromagnet. In particular, heterochiral magnet induced by SO coupling occurs extremely rarely in real solid-state materials. We present detailed experimental setup of realizing such a model in cold atom system. 
Bo Xiong, Jun-hui Zheng, Yu-Ju Lin, and Daw-wei Wang
cond-mat.quant-gas quant-ph