Correlated electron-hole state in twisted double-bilayer graphene
Peter Rickhaus, Folkert K. de Vries, Jihang Zhu, Elías Portoles, Giulia Zheng, Michele Masseroni, Annika Kurzmann, Takashi Taniguchi, Kenji Watanabe, Allan H. MacDonald, Thomas Ihn, Klaus Ensslin.