Wednesday, September 26, 2012

1209.5690 (Isabel Fernández-Torrente et al.)

Gating the charge state of a single molecule by local electric fields    [PDF]

Isabel Fernández-Torrente, Dagmar Kreikemeyer-Lorenzo, Anna Strozecka, Katharina J. Franke, Jose Ignacio Pascual
The electron acceptor molecule TCNQ is found in either of two distinct integer charge states when embedded into a monolayer of a charge transfer-complex on a gold surface. Scanning tun- neling spectroscopy measurements identify these states through the presence/absence of a zero-bias Kondo resonance. Increasing the (tip-induced) electric ?eld allows us to reversibly induce the ox- idation/reduction of TCNQ species from their anionic or neutral ground state, respectively. We show that the di?erent ground states arise from slight variations in the underlying surface potential, pictured here as the gate of a three-terminal device.
View original: http://arxiv.org/abs/1209.5690

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