Document Type

Journal Article

Department/Unit

Institute of Computational and Theoretical Studies

Abstract

We use cryogenic scanning tunneling microscopy/spectroscopy and density-functional theory calculations to inspect the modulation of electronic states of aromatic molecules. The molecules are self-assembled on a Cu(111) surface forming molecular networks in which the molecules are in different contact configurations, including laterally-coupled to different numbers of coordination bonds and vertically-adsorbed at different heights above the substrate. We quantitatively analyze the molecular states and find that a delocalized empty molecular state is modulated by these multiple contacts in a cooperative manner: its energy is down-shifted by ~0.16 eV for each additional lateral contact and by ~0.1 eV as the vertical molecule-surface distance is reduced by 0.1 Å in the physisorption regime. We also report that in a molecule-metal-molecule system the bridging metal can mediate the electronic states of the two molecules.

Publication Year

2013

Journal Title

Physical Review Letters

Volume number

110

Publisher

American Physical Society

First Page (page number)

046802-1

Last Page (page number)

046802-5

Referreed

1

DOI

10.1103/PhysRevLett.110.046802

ISSN (print)

00319007

Link to Publisher’s Edition

http://dx.doi.org/10.1103/PhysRevLett.110.046802

Copyright

© 2013 American Physical Society

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