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Title: Electron transport in discontinuous gold films and the effect of Coulomb blockade and percolation

Abstract

Understanding the electron transport in disordered assemblies of weakly coupled nano-sized metal clusters is important for many applications. Here, we investigate experimentally and theoretically the electron transport properties of metal cluster assemblies in the form of discontinuous gold films. Discontinuous films of different average island size are produced by sputter deposition, and the resistance and the non-linear current-voltage (I-V) characteristics of the films are measured as a function of temperature. To interpret the experimental electron transport data, a conduction percolation model is employed where broad probability distributions for both the tunnel junction gaps and the Coulomb blockade energies are used. Excellent agreement between experimental data and model calculations is found. In particular, the non-Arrhenius resistive behavior, the I-V power-law behavior, and the I-V characteristics at large bias voltage are all shown to be due to a conduction percolation mechanism governing disordered networks of nano-sized metal islands connected by tunnel junctions.

Authors:
 [1];  [1];  [2]
  1. CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield NSW 2070 (Australia)
  2. (Australia)
Publication Date:
OSTI Identifier:
22089248
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 111; Journal Issue: 12; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DEPOSITION; DISTRIBUTION; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; ELECTRONS; GOLD; NANOSTRUCTURES; NONLINEAR PROBLEMS; PROBABILITY; SPUTTERING; SUPERCONDUCTING JUNCTIONS; TEMPERATURE DEPENDENCE; THIN FILMS; TUNNEL EFFECT

Citation Formats

Mueller, K.-H., Yajadda, M. M. A., and School of Physics, University of Sydney, Sydney NSW 2006. Electron transport in discontinuous gold films and the effect of Coulomb blockade and percolation. United States: N. p., 2012. Web. doi:10.1063/1.4729491.
Mueller, K.-H., Yajadda, M. M. A., & School of Physics, University of Sydney, Sydney NSW 2006. Electron transport in discontinuous gold films and the effect of Coulomb blockade and percolation. United States. doi:10.1063/1.4729491.
Mueller, K.-H., Yajadda, M. M. A., and School of Physics, University of Sydney, Sydney NSW 2006. Fri . "Electron transport in discontinuous gold films and the effect of Coulomb blockade and percolation". United States. doi:10.1063/1.4729491.
@article{osti_22089248,
title = {Electron transport in discontinuous gold films and the effect of Coulomb blockade and percolation},
author = {Mueller, K.-H. and Yajadda, M. M. A. and School of Physics, University of Sydney, Sydney NSW 2006},
abstractNote = {Understanding the electron transport in disordered assemblies of weakly coupled nano-sized metal clusters is important for many applications. Here, we investigate experimentally and theoretically the electron transport properties of metal cluster assemblies in the form of discontinuous gold films. Discontinuous films of different average island size are produced by sputter deposition, and the resistance and the non-linear current-voltage (I-V) characteristics of the films are measured as a function of temperature. To interpret the experimental electron transport data, a conduction percolation model is employed where broad probability distributions for both the tunnel junction gaps and the Coulomb blockade energies are used. Excellent agreement between experimental data and model calculations is found. In particular, the non-Arrhenius resistive behavior, the I-V power-law behavior, and the I-V characteristics at large bias voltage are all shown to be due to a conduction percolation mechanism governing disordered networks of nano-sized metal islands connected by tunnel junctions.},
doi = {10.1063/1.4729491},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 12,
volume = 111,
place = {United States},
year = {2012},
month = {6}
}