27. Jiayu Li^#, Li Lin^#, Dingran Rui, Qiucheng Li, Yanfeng Zhang, Ning Kang, Hailin Peng, Zhongfan Li, and H. Q. Xu*. Breaking of electron-hole symmetry by charged defect scattering in high-quality nitrogen-doped graphene. ACS Nano 2017, 11, 4641.