Bulg. J. Phys. vol.36 no.s1 (2009), pp. 70-78



Single Electron Tunnelling as a Possible Conduction Mechanism in Diamond-Like Carbon Film

S.S. Tinchev1, S. Alexandrova2, E. Valcheva3
1Institute of Electronics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
2Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
3Physics Department, University of Sofia, J. Bourchier 5, 1164 Sofia, Bulgaria
Abstract. Nonlinear current–voltage characteristics and in some cases also step-like characteristics were observed in diamond like carbon films. We suggest that the transport mechanism is tunnelling between conducting nanoparticles in the films and the observation of step-like structures is a manifestation of Coulomb blockade found for the first time in these films. We point out that the origin of similar current-voltage characteristics observed in other carbon structures can be also Coulomb blockade phenomenon.

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