25. Jian Gou, Bingyu Xia, Hang Li, Xuguang Wang, Longjuan Kong, Peng Cheng, Hui Li, Weifeng Zhang, Tian Qian, Hong Ding, Yong Xu, Wenhui Duan, Kehui Wu, and Lan Chen,  A binary two-dimensional honeycomb lattice with strong spin-orbit coupling and electron-hole asymmetry, PHYSICAL REVIEW LETTERS 121, 126801 (2018).