Abstract
We report transport measurements through a single-molecule magnet, the derivative , 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 nondegenerate spin multiplets.
- Received 26 October 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.206801
©2006 American Physical Society