Correlated states in twisted double bilayer graphene

@article{Shen2020CorrelatedSI,
  title={Correlated states in twisted double bilayer graphene},
  author={Cheng Shen and Yanbang Chu and Quansheng Wu and Na Li and Shuopei Wang and Yanchong Zhao and Jian Tang and Jieying Liu and Jinpeng Tian and Kenji Watanabe and Takashi Taniguchi and Rong Yang and Zi Yang Meng and Dongxia Shi and Oleg V. Yazyev and Guangyu Zhang},
  journal={Nature Physics},
  year={2020},
  volume={16},
  pages={520-525}
}
Electron–electron interactions play an important role in graphene and related systems and can induce exotic quantum states, especially in a stacked bilayer with a small twist angle 1 – 7 . For bilayer graphene where the two layers are twisted by the ‘magic angle’, flat band and strong many-body effects lead to correlated insulating states and superconductivity 4 – 7 . In contrast to monolayer graphene, the band structure of untwisted bilayer graphene can be further tuned by a displacement field… 
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1Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India. 2Department of Physics, Indian Institute of Technology,
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