Electronic Transport Properties of Mn$_{12}$-Acetate Film Measured with Self-assembled Tunneling Junction

We measure the differential conductance of Mn$_{12}$-Acetate 2 monolayer film and found it is about 10$^{-7}$-10$^{-8}$ S. We observed the Kondo resonance and transition from dip to peak as initial resistance decreases. We calculated the Kondo temperature of Mn$_{12}$-Acetate on the surface of Pt and it is 346$\pm $86 K. Sudden conductance change about 1.0$\times $10$^{-8}$ S was observed and as it is highly unlikely caused by mechanical instability, we speculate it is caused by the molecular configuration change between 2 states, which agree with Gregory's assumption.