Signatures of Gate-Tunable Superconductivity in Trilayer Graphene/Boron Nitride Moir\'e Superlattice

Understand

Understanding the mechanism of high temperature (high Tc) superconductivity is a central problem in condensed matter physics.

• It is often speculated that high Tc superconductivity arises from a doped Mott insulator as described by the Hubbard model.
• An exact solution of the Hubbard model, however, is extremely challenging due to the strong electron-electron correlation.
• Therefore, it is highly desirable to experimentally study a model Hubbard system in which the unconventional superconductivity can be continuously tuned by varying the Hubbard parameters.