Nanowerk  April 10, 2024 A variety of two-dimensional systems have shown evidence for Wigner crystals (WCs), electrons crystallized into a closely packed lattice. However, a spontaneously formed classical or quantum WC has never been directly visualized. An international team of researchers (USA – Princeton University, UC Berkeley, Lawrence Berkeley National Laboratory, Japan) imaged a magnetic-field-induced electron WC in Bernal-stacked bilayer graphene and examined its structural properties as a function of electron density, magnetic field, and temperature. At high fields and the lowest temperature, they observed a triangular lattice electron WC in the lowest Landau level. The WC possessed the expected […]