QF Fellow and Associate seminar: Simon Munyan

Zero-field Wigner solids in ultra-thin films of Cd3As2

The quantum Wigner crystal is a many-body state where Coulombic repulsion causes electrons to crvstallize into a solid. Experimental realization of a quantum Wigner crystal at
zero magnetic field has been a long-sought goal. In this talk, Simon will present the recent discovery of both electron and hole Wigner solids in ultra-thin films of Cd.As, at zero
magnetic field. The Wigner solids are composed of pinned domains which produce hysteretic switching behavior in DC transport. Landau level spectroscopy indicates that the
formation of the Wigner solid is closely connected to a topological transition as the film thickness is reduced