Random Telegraphic Conductance Fluctuation at Au-Pentacene-Au Nanojunctions

Random telegraphic noises with a preferential jump height around 0.018G0 were observed in the conductance traces of the Au-pentacene-Au junctions. The distribution of the plateau lifetime obeyed an exponential distribution, but the decay constants were independent of the height of the adjacent conductance jumps or the measurement temperature. This result, along with the buckyferrocene (Fe(C60(CH3)5)C5H5) result, suggests that the conductance fluctuation originates from the current-induced geometrical fluctuation around a single molecule.