Anomalous charge transport behavior of Fullerene based diodes

We observed an anomalous voltage-current (V-I) characteristics of fullerene based diodes in the low temperature regime. The diodes exhibit a negative differential resistance and voltage hysteresis for opposite current sweep directions. This behavior is directly observable at temperatures below 95 K and indicates the formation of highly conductive filaments in the fullerene thin films. (C) 2004 American Institute of Physics.