Theory anticipates that the in-plane px, py orbitals in a honeycomb lattice lead to new and potentially useful quantum electronic phases. So far, p orbital bands were only realized for cold atoms in optical lattices and for light and exciton-polaritons in photonic crystals. For electrons, in-plane p orbital physics is difficult to access since natural electronic honeycomb lattices, such as graphene and silicene, show strong s-p hybridization. Here, we report on electronic honeycomb lattices prepared on a Cu(111) surface in a scanning tunneling microscope that, by design, show (nearly) pure orbital bands, including the p orbital flat band and Dirac cone.
@article{arxiv.2004.03158,
title = {p Orbital flat band and Dirac cone in the electronic honeycomb lattice},
author = {Thomas S. Gardenier and Jette J. van den Broeke and Jesper R. Moes and Ingmar Swart and Christophe Delerue and Marlou R. Slot and Cristiane Morais Smith and Daniel Vanmaekelbergh},
journal= {arXiv preprint arXiv:2004.03158},
year = {2020}
}