STM Studies of Isolated Mn12-Ph Single Molecule Magnets

We study Mn12O12(C6H5COO)16(H2O)4 (Mn12-Ph) single-molecule magnets on highly ordered pyrolytic graphite (HOPG) using low temperature scanning tunneling microscopy (LT-STM) experiments. We report Mn12-Ph in isolation, resembling single molecules with metallic core atoms and organic outer ligands. Th...

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Bibliographic Details
Published inarXiv.org
Main Authors Reaves, Kelley, Kim, Kyongwan, Iwaya, Katsuya, Hitosugi, Taro, Zhao, Hanhua, Dunbar, Kim R, Katzgraber, Helmut G, Teizer, Winfried
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 08.11.2012
Subjects
Dependence
Inhomogeneity
Magnets
Molecular structure
Pyrolytic graphite
Scanning tunneling microscopy
Spatial resolution
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Summary:We study Mn12O12(C6H5COO)16(H2O)4 (Mn12-Ph) single-molecule magnets on highly ordered pyrolytic graphite (HOPG) using low temperature scanning tunneling microscopy (LT-STM) experiments. We report Mn12-Ph in isolation, resembling single molecules with metallic core atoms and organic outer ligands. The local tunneling current observed within the molecular structure shows a strong bias voltage dependency, which is distinct from that of the HOPG surface. Further, evidence of internal inhomogeneity in the local density of states has been observed with high spatial resolution, and this inhomogeneity appears to be due to localized metallic behavior. These results facilitate magneto-metric studies of single molecule magnets in isolation. As compared to bulk crystal studies, our experiments allow the specific investigation of atomic sites in the molecule.
ISSN:2331-8422