We present linear ensembles of dangling bond chains on a hydrogen terminated Si(100) surface, patterned in the closest spaced arrangement allowed by the surface lattice. Local density of states maps over a range of voltages extending spatially over the close-coupled entities reveal a rich energetic and spatial variation of electronic states. These artificial molecules exhibit collective electronic states resulting from covalent interaction of the constituent atoms. A pronounced electrostatic perturbation of dangling bond chain structure is induced by close placement of a negatively dangling bond. The electronic changes so induced are entirely removed, paradoxically, by addition of a second dangling bond.
@article{arxiv.1607.06050,
title = {Multiple Silicon Atom Artificial Molecules},
author = {John A. Wood and Mohammad Rashidi and Mohammad Koleini and Jason L. Pitters and Robert A. Wolkow},
journal= {arXiv preprint arXiv:1607.06050},
year = {2016}
}