Vibrational Kondo Effect in Pure Organic Charge-Transfer Assemblies

I. Fernández-Torrente, K. J. Franke, and J. I. Pascual
Phys. Rev. Lett. 101, 217203 – Published 21 November 2008

Abstract

A Kondo resonance has been observed using a scanning tunneling microscope on a single molecular layer of a purely organic charge-transfer salt grown on a metal surface. Analysis of the Kondo anomaly reveals that the electron acceptor of the film possesses a spin-12 ground state due to the localization of an unpaired electron in the conjugated lowest unoccupied molecular orbital. Because of the π character of this molecular state the unpaired electron is strongly coupled to molecular vibrations, leading to the split of the Kondo resonance in vibrational sidebands.

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  • Received 9 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.217203

©2008 American Physical Society

Authors & Affiliations

I. Fernández-Torrente, K. J. Franke, and J. I. Pascual

  • Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

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Vol. 101, Iss. 21 — 21 November 2008

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