A Bose-Einstein condensate in a lattice produced by simultaneous Raman and RF coupling

Experiments with ultracold atoms allow for the generation of unique lattice structures probing advanced concepts from condensed matter and fundamental physics. Here, we experimentally demonstrate a spin-dependent, Galilean invariant lattice which emerges from the simultaneous application of Raman dressing and RF coupling. The Raman dressing explicitly breaks Galilean symmetry and produces linear spin-orbit coupling. When the RF coupling is added, Galilean symmetry is restored and a lattice structure emerges. With time-of-flight observations, we demonstrate key features of this novel lattice.