Nonlinear electrical conductivity in a 1D granular medium

  title={Nonlinear electrical conductivity in a 1D granular medium},
  author={Eric Falcon and B. Castaing and M. Creyssels},
  journal={The European Physical Journal B - Condensed Matter and Complex Systems},
Abstract.We report on observations of the electrical transport within a chain of metallic beads (slightly oxidized) under an applied stress. A transition from an insulating to a conductive state is observed as the applied current is increased. The voltage-current (U-I) characteristics are nonlinear and hysteretic, and saturate to a low voltage per contact (0.4 V). Our 1D experiment allows us to understand phenomena (such as the “Branly effect”) related to this conduction transition by focusing… Expand

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