title: Single molecule magnetoresistance with combined antiferromagnetic and ferromagnetic electrodes.
abstract: The magnetoresistance of a hydrogen-phthalocyanine molecule placed on an antiferromagnetic Mn(001) surface and contacted by a ferromagnetic Fe electrode is investigated using density functional theory based transport calculations and low-temperature scanning tunneling microscopy. A large and negative magnetoresistance ratio of ~50% is observed in combination with a high conductance. The effect originates from a lowest unoccupied molecular orbital (LUMO) doublet placed almost in resonance with the Fermi energy. As a consequence, irrespective of the mutual alignment of magnetizations, electron transport is always dominated by resonant transmission of Mn-majority charge carries going through LUMO levels.
authors.affiliation: Institute of Nanotechnology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany. Alexej.Bagrets@kit.edu
authors.forename: Alexei
authors.initials: A
authors.lastname: Bagrets
authors.forename: Stefan
authors.initials: S
authors.lastname: Schmaus
authors.forename: Ali
authors.initials: A
authors.lastname: Jaafar
authors.forename: Detlef
authors.initials: D
authors.lastname: Kramczynski
authors.forename: Toyo Kazu
authors.initials: TK
authors.lastname: Yamada
authors.forename: Mébarek
authors.initials: M
authors.lastname: Alouani
authors.forename: Wulf
authors.initials: W
authors.lastname: Wulfhekel
authors.forename: Ferdinand
authors.initials: F
authors.lastname: Evers