Pablo Jarillo-Herrero (MIT) presents his surprising discovery of an ultrathin material consisting of two misaligned sheets of graphene that can be easily converted from being a Mott insulator to a superconductor at the APS March Meeting 2018 in Los Angeles, CA.
A simple system made from two sheets of graphene has been converted from an insulator to a superconductor. The finding holds promise for opening up studies of an unconventional form of superconductivity.
The realization of intrinsic unconventional superconductivity—which cannot be explained by weak electron–phonon interactions—in a two-dimensional superlattice created by stacking two sheets of graphene that are twisted relative to each other by a small angle has been shown.
Nature 556, pages 43–50 (2018); doi:10.1038/nature26160