Spin-orbit coupled Bose-Einstein condensates in a one-dimensional   optical lattice
  The realization of artificial gauge fields and spin-orbit coupling for ultra-cold quantum gases promises new insight into paradigm solid state systems. Here we experimentally probe the dispersion relation of a spin-orbit coupled Bose-Einstein condensate loaded into a translating optical lattice by observing its dynamical stability, and develop an effective band structure that provides a theoretical understanding of the locations of the band edges. This system presents exciting new opportunities for engineering condensed-matter analogs using the flexible toolbox of ultra-cold quantum gases. 
C. Hamner, Yongping Zhang, M. A. Khamehchi, Matthew J. Davis, P.   Engels
cond-mat.quant-gas