Quantum confinement in self-assembled two-dimensional nanoporous honeycomb networks at close-packed metal surfaces

The Journal of Chemical Physics
N KepčijaJ V Barth

Abstract

Quantum confinement of a two-dimensional electron gas by supramolecular nanoporous networks is investigated using the boundary elements method based on Green's functions for finite geometries and electron plane wave expansion for periodic systems. The "particle in a box" picture was analyzed for cases with selected symmetries that model previously reported architectures constructed from organic and metal-organic scattering centers confining surface state electrons of Ag(111) and Cu(111). First, by analyzing a series of cases with systematically defined parameters (scattering geometry, potentials, and effective broadening), we demonstrate how the scattering processes affect the properties of the confined electrons. For the features of the local density of states reported by scanning tunneling spectroscopy (STS), we disentangle the contributions of lifetime broadening and splitting of quantum well states due to coupling of neighboring quantum dots. For each system, we analyze the local electron density distribution and relate it to the corresponding band structure as calculated within the plane-wave expansion framework. Then, we address two experimental investigations, where in one case only STS data and in the other case mainly ...Continue Reading

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Citations

Jul 28, 2016·The Journal of Physical Chemistry Letters·Benjamen N TaberGeorge V Nazin
Jun 11, 2015·Chemical Communications : Chem Comm·Koen SchoutedenEwald Janssens
Oct 7, 2017·Nature Communications·Ignacio Piquero-ZulaicaShigeki Kawai
Mar 17, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Kathrin MüllerMeike Stöhr
Jan 18, 2020·Physical Review Letters·Ignacio Piquero-ZulaicaJorge Lobo-Checa
Oct 10, 2021·Nature Communications·Xinnan PengJiong Lu

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