Electron transport through single Mn12 molecular magnets

Details Electron transport through single Mn12 molecular magnets Electron transport through single Mn12 molecular magnets

2005-10-27

arxiv.org/abs/cond-mat/0510732v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for Phys. Rev. Lett., 5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.206801

We report transport measurements through a single-molecule magnet, the Mn12 derivative [Mn12O12(O2C-C6H4-SAc)16(H2O)4], in a single-molecule transistor geometry. Thiol groups connect the molecule to gold electrodes that are fabricated by electromigration. Striking observations are regions of complete current suppression and excitations of negative differential conductance on the energy scale of the anisotropy barrier of the molecule. Transport calculations, taking into account the high-spin ground state and magnetic excitations of the molecule, reveal a blocking mechanism of the current involving non-degenerate spin multiplets.

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