Abstract: Stacking van der Waals layers provides new opportunities to design electronic band structure. The weak bonding between layers enables the addition of a relative twist and allows for relaxation into distinct local stacking configurations. Together, these effects generate spatially modulated electronic structure over a variety of length scales. Recent measurements of twisted trilayer graphene reveal a rich interplay between its structural and electronic degrees of freedom. Through joint imaging and transport studies, distinct limits of interlayer angles and the resulting electronic character are characterized. These results inform the broader phase diagram of twisted moiré multilayers and their unique quantum electronic phases.

Ben Feldman is an Assistant Professor of Physics at Stanford University and is affiliated with the Geballe Laboratory for Advanced Materials and SLAC National Accelerator Laboratory. He started at Stanford in 2018 following a Dicke postdoctoral fellowship at Princeton University in the lab of Prof. Ali Yazdani. He earned his Ph.D. from Harvard University in 2013 working with Prof. Amir Yacoby. Research in the Feldman lab is focused on emergent strongly correlated and topological states, especially in 2D quantum materials. We use a mixture of cryogenic electronic transport, scanned probe microscopy, and capacitive sensing to realize, study, and control these novel phases.