Substrate, a choice of engineering the pseudospin in graphene
Jiahao Yan, Liangmei Wu, Rui-Song Ma, Shiyu Zhu, Ce Bian, Jiajun Ma, Qing Huan, Lihong Bao, Jinhai Mao, Shixuan Du, Hong-Jun Gao

Charge order and broken rotational symmetry in magic-angle twisted bilayer graphene
Yuhang Jiang, Xinyuan Lai, Kenji Watanabe, Takashi Taniguchi, Kristjan Haule, Jinhai Mao, and Eva Y. Andrei