P orbital flat band and dirac cone in the electronic honeycomb lattice
Publication date
2020-10-27
Authors
Gardenier, Thomas S.
Van Den Broeke, J. J.
Moes, Jesper René
Swart, Ingmar
Delerue, Christophe
Slot, Marlou Rosalie
de Morais Smith, Cristiane
Vanmaekelbergh, D.A.M.
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Document Type
Article
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Abstract
Theory anticipates that the in-plane px, py orbitals in a honeycomb lattice lead to potentially useful quantum electronic phases. So far, p orbital bands were only realized for cold atoms in optical lattices and for light and excitonpolaritons 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.
Keywords
Electronic lattice, Flat band, Honeycomb, Muffin-tin calculations, P orbital, Scanning tunneling microscopy (STM), Scanning tunneling spectroscopy (STS)
Citation
Gardenier, T S, Van Den Broeke, J J, Moes, J R, Swart, I, Delerue, C, Slot, M R, Smith, C M & Vanmaekelbergh, D 2020, 'P orbital flat band and dirac cone in the electronic honeycomb lattice', ACS Nano, vol. 14, no. 10, pp. 13638-13644. https://doi.org/10.1021/acsnano.0c05747