Affiliation
Rutgers University
Title
Superconductivity with a double twist
Abstract
The discovery of superconductivity in twisted graphene layers has made it possible to revisit long standing open questions about the nature of superconductivity in two dimensions. We studied the emergence of superconductivity in mirror-symmetric twisted trilayer graphene and its dependence on temperature and magnetic field. Our findings include the observation of a magnetically driven superconductor to insulator transition occurring at the quantum pair resistance h/(2e2); a critical exponent, zn=3/2, placing trilayer graphene in the same universality class as High Tc superconductors; and vortex pinning barriers that are more than an order of magnitude lower than in any other material, making this the cleanest known superconductor