Metallic Dots

A wide variety of disordered systems exhibit threshold behavior and nonlinear response to an applied drive. One such system is charge transport through metallic dot arrays, such as, for example, through triangular monolayers of gold nanocrystals. In models of randomly charged dots separated by tunnel barriers, threshold behavior and scaling of the current-voltage curves are found. Experimentally, a wide range of scaling exponents appear. This may be related to the different effective dimensionality of the experimental systems.

Papers:

1. Temperature and ac effects on charge transport in metallic arrays of dots
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. B 68, 165305 (2003).
   Online version
   

2. Charge transport transitions and scaling in disordered arrays of metalic dots
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. Lett. 90, 046802 (2003).
   Online version
   

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Last Modified: 1/23/03