Switching of perpendicular magnetization by spin-orbit torques in the absence of external magnetic fields

Guoqiang Yu^*, Pramey Upadhyaya, Yabin Fan, Juan G. Alzate, Wanjun Jiang, Kin L. Wong, So Takei, Scott A. Bender, Li Te Chang, Ying Jiang, Murong Lang, Jianshi Tang, Yong Wang, Yaroslav Tserkovnyak, Pedram Khalili Amiri, Kang L. Wang