Doppler velocimetry of spin and charge currents in the 2D Fermi gas J. D. Koralek, L. Yang, D. R. Tibbetts, J. L. Reno, M. P. Lilly and J. Orenstein EPJ Web of Conferences, 41 (2013) 03017 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134103017