In twisted bilayer graphene, two sheets of graphene are stacked on top of one another with a slight angular twist. In principle, at a certain “magic” twist angle, the speed of electrons in the material approaches zero, said Dr. It turns out that the contribution is tiny.”The experimental measurements and theoretical analyses demonstrated that the dominant contribution to superconductivity is instead from quantum geometry, which is analogous to ordinary geometry but originates from quantum many-body physics. “The same is true for the space in which the quantum electrons live. In this so-called Hilbert space, quantum geometry can give rise to unbelievable material properties and applications, such as the superconductivity discussed in this study and intelligent quantum sensing, which we demonstrated in a previous work.”Superconductivity enabled by quantum geometry is an unconventional mechanism.