Superstructures and Electronic Properties of Manganese-Phthalocyanine Molecules on Au(110) from Submonolayer Coverage to Ultrathin Molecular Films.
The adsorption of manganese-phthalocyanine molecules on Au(110) was investigated using a low-temperature scanning tunneling microscope. A rich variety of commensurate superstructures was observed upon increasing the molecule coverage from submonolayers to ultrathin films. All structures were associated with reconstructions of the Au(110) substrate. Molecules adsorbed in the second molecular layer exhibited negative differential conductance occurring symmetrically around zero bias voltage. A double-barrier tunneling model rationalized this observation in terms of a peaked molecular resonance at the Fermi energy together with a voltage drop across the molecular film.
Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany.
M
M
Topyła
Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany.
N
N
Néel
Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany.
J
J
Kröger