Imaging topology and interaction effects in a tunable bilayer graphene quantum dot (Part II)

Electronic interactions and nontrivial band topology can strongly modify the quantized bound states in semiconductor quantum dots (QDs), giving rise to rich spatial patterns in their electronic wavefunctions. While extensive theoretical studies and global measurements have explored such effects in QDs, direct knowledge of how electrons spatially organize remains limited, owing to the experimental challenges of applying scanning probes to such systems. In this work, we employ scanning tunneling microscopy (STM) to investigate bilayer graphene quantum dots. In the second part of this series of presentations, I will demonstrate that tuning the magnetic field and confining potential profile leads to the breaking of rotational symmetry and the emergence of unexpected spatial patterns in the electronic wavefunctions. These results establish STM as a uniquely powerful probe of the microscopic behavior of few-electron systems in a highly tunable, quasi-zero-dimensional platform.