Written by Katherine Wright, senior editor for Physics, and re-published here with permission. See original post: https://physics.aps.org/synopsis-for/10.1103/PhysRevLett.123.197701 The Wigner crystal is an elusive beast. Predicted in 1934, this crystal of electrons, which is one of the most strongly correlated states of matter, forms when the electron density is ultralow. But a lack of clean enough systems […]