A single molecule Kondo switch: multistability of tetracyanoethylene on Cu(111).
basic_science · Level V
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- Record sourced from PubMed, PMID 20831233.
- Also identified by DOI 10.1021/nl1024563.
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Abstract
Single tetracyanoethyelene (TCNE) molecules on Cu(111) are reversibly switched among five states by applying voltage pulses with the tip of a scanning tunneling microscope. A pronounced Kondo resonance in tunneling spectroscopy indicates that one of the states is magnetic. Side bands of the Kondo resonance appear at energies which correspond to inter- and intramolecular vibrational modes. Density functional theory suggests that molecular deformation changes the occupancy in TCNE's molecular orbitals, thus producing the magnetic state.