A single molecule kondo switch: Multistability of tetracyanoethylene on Cu(111)

Taeyoung Choi, Stéphane Bedwani, Alain Rochefort, Chia Yi Chen, Arthur J. Epstein, Jay A. Gupta

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

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.

Original languageEnglish
Pages (from-to)4175-4180
Number of pages6
JournalNano Letters
Volume10
Issue number10
DOIs
StatePublished - 13 Oct 2010

Keywords

  • charge transfer
  • Kondo resonance
  • organic magnets
  • Scanning tunneling microscopy
  • scanning tunneling spectroscopy
  • tetracyanoethylene

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