Superconductivity has been observed in moiré systems such as twisted bilayer graphene, which host flat, dispersionless electronic bands. In parallel, theory work has discovered that superconductivity and superfluidity of flat-band systems can be made po
Superconductivity in metallic twisted bilayer graphene stabilized by WSe2 Article 15 July 2020 Data availability Source data are provided with this paper. All other data are available from the corresponding authors upon reasonable request. References Andrei, E. Y. & MacDonald, A. H. Graphene bi...
The emergence of superconductivity and correlated insulators in magic-angle twisted bilayer graphene (MATBG) has raised the intriguing possibility that its pairing mechanism is distinct from that of conventional superconductors, as described by the Bardeen鈥揅ooper鈥揝chrieffer (BCS) theory. However, ...
应物质学院光子科学与凝聚态物理研究部刘健鹏教授邀请,北京大学宋志达教授将于3月11日来校进行题为“Molecular Pairing in Twisted Bilayer Graphene Superconductivity”的学术报告,邀请感兴趣的老师、同学参加。 日期:2024年3月11日,星期一 时间:16:00-...
We show that the recently observed superconductivity in twisted bilayer graphene (TBG) can be explained as a consequence of the Kohn-Luttinger (KL) instability which leads to an effective attraction between electrons with originally repulsive interaction. Usually, the KL instability takes place at ...
We present a theory of phonon-mediated superconductivity in near magic angle twisted bilayer graphene. Using a microscopic model for phonon coupling to moire band electrons, we find that phonons generate attractive interactions in both s- and d-wave pairing channels and that the attraction is strong...
Magic-angle twisted bilayer graphene (MATBG) has been extensively explored both theoretically and experimentally as a suitable platform for a rich and tunable phase diagram that includes ferromagnetism, charge order, broken symmetries, and unconventional superconductivity. In this paper, we investigate ...
Theory of correlated insulating behaviour and spin-triplet superconductivity in twisted double bilayer graphene Two monolayers of graphene twisted by a small `magic' angle exhibit nearly flat bands leading to correlated electronic states and superconductivity, whose precise nature including possible broken sy...
Magic-angle twisted bilayer graphene (TBG), with rotational misalignment close to 1.1 degrees, features isolated flat electronic bands that host a rich phase diagram of correlated insulating, superconducting, ferromagnetic and topological phases1,2,3,4,5,6. Correlated insulators and superconductivity hav...
H. Electronic structure of single-twist trilayer graphene. Preprint at https://arxiv.org/abs/1907.12338 (2019). Oh, M. et al. Evidence for unconventional superconductivity in twisted bilayer graphene. Nature 600, 240–245 (2021). Article CAS ADS PubMed Google Scholar Carr, S. et al. ...