%0 Journal Article
%T Experimental realization of a two-dimensional synthetic spin-orbit coupling in ultracold Fermi gases
%A Lianghui Huang
%A Zengming Meng
%A Pengjun Wang
%A Peng Peng
%A Shao-Liang Zhang
%A Liangchao Chen
%A Donghao Li
%A Qi Zhou
%A Jing Zhang
%J Physics
%D 2015
%I arXiv
%X Spin-orbit coupling (SOC) is central to many physical phenomena, including fine structures of atomic spectra and quantum topological matters. Whereas SOC is in general fixed in a physical system, atom-laser interaction provides physicists a unique means to create and control synthetic SOC for ultracold atoms \cite{Dalibard}. Though significant experimental progresses have been made, a bottleneck in current studies is the lack of a two-dimensional (2D) synthetic SOC, which is crucial for realizing high-dimensional topological matters. Here, we report the experimental realization of 2D SOC in ultracold $^{40}$K Fermi gases using three lasers, each of which dresses one atomic hyperfine spin state. Through spin injection radio-frequency (rf) spectroscopy, we probe the spin-resolved energy dispersions of dressed atoms, and observe a highly controllable Dirac point created by the 2D SOC. Our work paves the way for exploring high-dimensional topological matters in ultracold atoms using Raman schemes.
%U http://arxiv.org/abs/1506.02861v1