p-band engineering in artificial electronic lattices

Abstract

Artificial electronic lattices, created atom by atom in a scanning tunneling microscope, have emerged as a highly tunable platform to realize and characterize the lowest-energy bands of novel lattice geometries. Here, we show that artificial electronic lattices can be tailored to exhibit higher-energy bands. We study p-like bands in four-fold and three-fold rotationally symmetric lattices. In addition, we show how an anisotropic design can be used to lift the degeneracy between p_x- and p_y-like bands. The experimental measurements are corroborated by muffin-tin and tight-binding calculations. The approach to engineer higher-energy electronic bands in artificial quantum systems introduced here enables the realization of complex band structures from the bottom up.

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Cited by in corpus (4)

• Second-order topological corner states with ultracold atoms carrying orbital angular momentum in optical lattices
• Corner modes of the breathing kagome lattice: origin and robustness
• Quantum degenerate Fermi gas in an orbital optical lattice
• Lieb lattices formed by real atoms on Ag(111) and their lattice constant dependent electronic properties