Fig. 1: Device and electron transport spectra.

a Structure of Manganese(II) phthalocyanine molecule (MnPC, top), a schematic diagram of a single MnPC molecule transistor device (bottom). b SEM image of the device after breaking: gold nanowire over an Al2O3/Al gate, a nanogap formed in gold nanowire by electromigration. The scale bar of the inset is 100 nm. c, d Color plots of differential conductance (dI/dV) as a function of bias voltage (Vsd) and gate voltage (Vg) for device 1 at 280 mK (c) and device 2 at 1.4 K (d).