Kondo effect by controlled cleavage of a single molecule contact

Nanotechnology 19 (2008) 065401 Conductance measurements of a molecular wire, contacted between an epitaxial molecule-metal bond and the tip of a scanning tunneling microscope, are reported. Controlled retraction of the tip gradually de-hybridizes the molecule from the metal substrate. This tunes th...

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Bibliographic Details
Main Authors Temirov, R, Lassise, A. C, Anders, F, Tautz, F. S
Format Journal Article
LanguageEnglish
Published 01.12.2006
Subjects
Physics - Materials Science
Physics - Strongly Correlated Electrons
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Summary:Nanotechnology 19 (2008) 065401 Conductance measurements of a molecular wire, contacted between an epitaxial molecule-metal bond and the tip of a scanning tunneling microscope, are reported. Controlled retraction of the tip gradually de-hybridizes the molecule from the metal substrate. This tunes the wire into the Kondo regime in which the renormalized molecular transport orbital serves as spin impurity at half filling and the Kondo resonance opens up an additional transport channel. Numerical renormalization group simulations suggest this type of behavior to be generic for a common class of metal molecule bonds. The results demonstrate a new approach to single-molecule experiments with atomic-scale contact control and prepare the way for the ab initio simulation of many-body transport through single-molecule junctions.
DOI:10.48550/arxiv.cond-mat/0612036