“Current-induced switching of perpendicularly-magnetized magnetic layers using spin torque from the spin Hall effect.” L. Q. Liu, O. J. Lee, T. J. Gudmundsen, D. C. Ralph and R. A. Buhrman. Phys. Rev. Lett. 109, 096602 (2012). https://doi.org/10.1103/PhysRevLett.109.096602

“Spin transfer torque devices utilizing the giant spin Hall effect of tungsten.” C.-F. Pai, L. Q. Liu, Y. Li, H. W. Tseng, D. C. Ralph and R. A. Buhrman. Appl. Phys. Lett. 101, 122404 (2012). http://dx.doi.org/10.1063/1.4753947

"Enhancement of the anti-damping spin torque efficacy of platinum by interface modification.” M-H Nguyen, Chi-Feng Pai, Kayla X. Nguyen, David A. Muller, C. Ralph R. A. Buhrman, Applied Physics Letters 106, 222402 (2015); http://dx.doi.org/10.1063/1.4922084