title: A single molecule Kondo switch: multistability of tetracyanoethylene on Cu(111).
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.
authors.affiliation: Department of Physics, Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: Taeyoung
authors.initials: T
authors.lastname: Choi
authors.forename: Stéphane
authors.initials: S
authors.lastname: Bedwani
authors.forename: Alain
authors.initials: A
authors.lastname: Rochefort
authors.forename: Chia-Yi
authors.initials: CY
authors.lastname: Chen
authors.forename: Arthur J
authors.initials: AJ
authors.lastname: Epstein
authors.forename: Jay A
authors.initials: JA
authors.lastname: Gupta