What drives superconductivity in twisted bilayer graphene?

Posted in Journal Articles on May 31, 2020 at 1:53 pm by JCCMP

1. The interplay of insulating and superconducting orders in magic-angle graphene bilayers
Authors: Petr Stepanov, Ipsita Das, Xiaobo Lu, Ali Fahimniya, Kenji Watanabe, Takashi Taniguchi, Frank H. L. Koppens, Johannes Lischner, Leonid Levitov, and Dmitri K. Efetov

2. Decoupling superconductivity and correlated insulators in twisted bilayer graphene
Authors: Yu Saito, Jingyuan Ge, Kenji Watanabe, Takashi Taniguchi, and Andrea F. Young

3. Tuning electron correlation in magic-angle twisted bilayer graphene using Coulomb screening
Authors: Xiaoxue Liu, Zhi Wang, K. Watanabe, T. Taniguchi, Oskar Vafek, and J.I.A. Li

4. Nematicity and Competing Orders in Superconducting Magic-Angle Graphene
Authors: Yuan Cao, Daniel Rodan-Legrain, Jeong Min Park, Fanqi Noah Yuan, Kenji Watanabe, Takashi Taniguchi, Rafael M. Fernandes, Liang Fu, and Pablo Jarillo-Herrero

Recommended with a commentary by T. Senthil, Massachusetts Institute of Technology
|View Commentary (pdf)|

This commentary may be cited as:
DOI: 10.36471/JCCM_May_2020_03

2 responses on “What drives superconductivity in twisted bilayer graphene?”

  1. Siu-Wai CHAN says:

    Have you guys heard of O-lattice or coincident site lattice? We, metallurgists have used these lattice-concepts to identify different grain boundaries of significance.

  2. T. Senthil says:

    Since the appearance of my commentary, one of the experimental results highlighted has been revised. In the first version of their arXiv paper Liu et al reported that superconductivity in Twisted Bilayer Graphene (TBLG) is suppressed in the presence of a proximate conducting Bernal-stacked bilayer graphene. The authors have since shown that this effect is likely due to radio frequency noise. Their improved measurements (https://arxiv.org/pdf/2003.11072.pdf) filtered out this noise and found that the superconductivity is actually moderately enhanced when the Bernal bilayer graphene is made conducting. This finding lessens the contrast with the other highlighted papers by Stepanov et al and by Saito et al.

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