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.
@article{arxiv.1907.03568,
title = {p-band engineering in artificial electronic lattices},
author = {M. R. Slot and S. N. Kempkes and E. J. Knol and W. M. J. van Weerdenburg and J. J. van den Broeke and D. Wegner and D. Vanmaekelbergh and A. A. Khajetoorians and C. Morais Smith and I. Swart},
journal= {arXiv preprint arXiv:1907.03568},
year = {2019}
}