Highly spin-polarized multi-GeV electron beams generated by single-species plasma photocathodes oleh Zan Nie, Fei Li, Felipe Morales, Serguei Patchkovskii, Olga Smirnova, Weiming An, Chaojie Zhang, Yipeng Wu, Noa Nambu, Daniel Matteo, Kenneth A. Marsh, Frank Tsung, Warren B. Mori, Chan Joshi