2019_EJRNL_PP_M__R__SLOT_1.pdf
Terbatas Ratnasari
» ITB
Terbatas Ratnasari
» ITB
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 fourfold and threefold rotationally symmetric lattices. In addition, we show how an
anisotropic design can be used to lift the degeneracy between px- and py-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.