Interface-Induced Spin and Dipole Ordering of the Copper Spin ½ Molecule: Bis(4-cyano-2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II)

Authors

David Wisbey, University of Nebraska-Lincoln
Ning Wu, University of Nebraska-Lincoln
Danqin Feng, University of Nebraska-Lincoln
Anthony N. Caruso, North Dakota State UniversityFollow
John Belot
Yaroslav B. LosovyjFollow
Elio Vescovo, Brookhaven National LaboratoryFollow
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

2008

Comments

Published in J. Phys. Chem. C 2008, 112, 13656–13662.

Abstract

Using light-polarization-dependent angle-resolved photoemission, the metal-organic molecule bis(4-cyano- 2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II) (or Cu(CNdpm)₂, i.e., C₂₄H₃₆N₂O₄Cu, Cu(II)) is observed to adopt a preferential orientation that depends on the film thickness and substrate when adsorbed on Co(111) and Cu(111). In addition, the final-state binding energies change with film thickness, suggesting the substrates affect the screening or charging in the photoemission final state. For Cu(CNdpm)₂ deposited on Co(111), the induced spin polarization was found to depend strongly on the molecular orbital contributions.