Electronic and Electrochemical Properties of Moiré Superlattices

The formation of moiré superlattices alters the electronic band structure in a manner that is systematically dependent on the interlayer twist angle, but spontaneous strain relaxation has considerable impact on the resulting physics. This talk will focus on the use of four-dimensional scanning transmission electron microscopy measurements to map lattice relaxation in bilayer and trilayer moiré superlattices and how these structural perturbations impact both the correlated electron physics of the materials as well as their interfacial electrochemical behavior measured by scanning electrochemical cell microscopy.