Please use this identifier to cite or link to this item: doi:10.22028/D291-30937
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Title: Surface state tunable energy and mass renormalization from homothetic quantum dot arrays
Author(s): Piquero-Zulaica, Ignacio
Li, Jun
Abd El-Fattah, Zakaria M.
Solianyk, Leonid
Gallardo, Iker
Monjas, Leticia
Hirsch, Anna
Arnau, Andres
Ortega, Enrique
Stöhr, Meike
Lobo-Checa, Jorge
Language: English
Title: Nanoscale
Volume: 11
Issue: 48
Startpage: 23132
Endpage: 23138
Publisher/Platform: RSC
Year of Publication: 2019
Publikation type: Journal Article
Abstract: Quantum dot arrays in the form of molecular nanoporous networks are renowned for modifying the electronic surface properties through quantum confinement. Here we show that, compared to the pristine surface state, the band bottom of the confined states can exhibit downward shifts accompanied by a lowering of the effective masses simultaneous to the appearance of tiny gaps at the Brillouin zone boundaries. We observed these effects by angle resolved photoemission for two self-assembled homothetic (scalable) Co-coordinated metal–organic networks. Complementary scanning tunneling spectroscopy measurements confirmed these findings. Electron plane wave expansion simulations and density functional theory calculations provide insight into the nature of this phenomenon, which we assign to metal–organic overlayer–substrate interactions in the form of adatom–substrate hybridization. To date, the absence of the experimental band structure resulting from single metal adatom coordinated nanoporous networks has precluded the observation of the significant surface state renormalization reported here, which we infer to be general for low interacting and well-defined adatom arrays.
DOI of the first publication: 10.1039/C9NR07365E
URL of the first publication:!divAbstract
Link to this record: hdl:20.500.11880/29151
ISSN: 2040-3372
Date of registration: 14-May-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Pharmazie
Professorship: NT - Prof. Dr. Anna Hirsch
Collections:UniBib – Die Universitätsbibliographie

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