Chiral Wigner crystal phases induced by Berry curvature

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• Brian Skinner, Ohio State University
• Friday 27 September 2024, 11:30-12:30
• TCM Seminar Room.

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In 1934 Eugene Wigner first predicted that a gas of electrons at zero temperature is susceptible to a quantum freezing transition when its density is made low enough, due to the long-ranged Coulomb interaction between electrons. This Wigner crystal (WC) state has only very recently been realized and visualized in two dimensional materials without applied magnetic field. Here I discuss new forms of the Wigner crystal state that can arise in materials with Berry curvature. I focus specifically on bilayer graphene, and discuss the phase diagram and the different ordered states of the Wigner crystal.

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