
Fig. 1
SEM image of thin graphite flake with silver electrodes before irradiation (image scale bar is 25 µm).

Fig. 2
R-T behavior of thin graphite flake (a) before ion irradiation (b) after ion irradiation.

Fig. 3
Room temperature current-voltage (I-V) characteristics of a thin graphite flake (a) before ion irradiation (b) after ion irradiation.

Fig. 4
Temperature dependent current-voltage characteristics of a thin graphite flake after ion irradiation.

Fig. 5
Temperature dependent conductance measurement of a thin graphite flake after ion irradiation.