APS March Meeting 2018

Session K35: 2D Materials - Superconductivity and Charge Density Waves I

K35.7: Magic-Angle Graphene Superlattices: a New Platform for Strongly Correlated Physics
Pablo Jarillo-Herrero, MIT

Wednesday, March 7
9:12 a.m. - 9:48 a.m.
LACC, 409B
Broadcasting at the Compass Café near the South Lobby

In this talk I will discuss a new platform for strongly correlated physics based on magic-angle graphene superlattices. In particular, I will show that when two graphene sheets are twisted by an angle close to the theoretically predicted ‘magic angle’, the resulting flat band structure near the Dirac point gives rise to a strongly-correlated electronic system. These flat bands exhibit half-filling insulating phases at zero magnetic field, which we show to be a Mott-like insulator arising from electrons localized in the moiré superlattice. Doping away from the Mott-like state, we achieve electrically tunable superconductivity, with many characteristics similar to cuprate superconductivity, including superconducting domes, small Fermi pockets, and strong coupling.

View Session K35 in the Scientific Program