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Rehybridization of electronic structure in compressed two-dimensional quantum dot superlattices

Medeiros-Ribeiro, G. and Ohlberg, D. A. A. and Williams, R. Stanley and Heath, James R. (1999) Rehybridization of electronic structure in compressed two-dimensional quantum dot superlattices. Physical Review B, 59 (3). pp. 1633-1636. ISSN 0163-1829.

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Two-dimensional superlattices of organically passivated 2.6-nm silver quantum dots were prepared as Langmuir monolayers and transferred to highly oriented pyrolytic graphite substrates. The structural and electronic properties of the films were probed with variable temperature scanning tunneling microscopy. Particles passivated with decanethiol (interparticle separation distance of ∼1.1±0.2 nm) exhibited Coulomb blockade and staircase. For particles passivated with hexanethiol or pentanethiol (interparticle separation distance of ∼0.5±0.2 nm), the single-electron charging was quenched, and the redistribution of the density of states revealed that strong quantum mechanical exchange, i.e., wave-function hybridization, existed among the particles in these films.

Item Type:Article
Additional Information:©1999 The American Physical Society. Received 8 October 1998. We acknowledge Alex Bratkovski and Andrew Briggs for stimulating discussions. J.R.H. acknowledges the Packard Foundation and the Sloan Foundation for financial support, as well the Hewlett Packard Corporation and an NSF-GOALI grant.
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ID Code:6112
Deposited By: Tony Diaz
Deposited On:25 Nov 2006
Last Modified:26 Dec 2012 09:17

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