Evidence for a Bilayer Quantum Wigner Solid.

As the electronic charge distribution in a wide quantum well is tuned from a single-layer through an interacting bilayer configuration to weakly-coupled parallel layers, we observe an insulating phase concurrently manifesting a dramatic evolution. The data reveal that interlayer interactions, playing a crucial role, are able to stabilize a correlated bilayer electron insulator, thus providing tantalizing evidence of a pinned bilayer Wigner solid phase crystallizing at total filling factor ν as large as 0.54 (ν > 1 4 in each layer). PACS: 71.45.–d, 73.20.Dx, 73.40.Hm Typeset using REVTEX