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“Spin torque switching with the giant spin Hall effect of tantalum.” L. Q. Liu, C.-F. Pai, Y. Li, H. W. Tseng, D. C. Ralph, and R. A. Buhrman.  Science 336, 555 (2012). https://doi.org/10.1126/science.1218197

“Strong spin Hall effect in the antiferromagnet PtMn,” Y. X. Ou, S. J. Shi, D. C. Ralph, and R. A. Buhrman, Physical Review B 93 (2016), Artn 220405, https://doi.org/10.1103/PhysRevB.93.220405