Universal temperature dependence of the conductivity of a strongly disordered granular metal
Abstract
A disordered array of metal grains with large and random intergrain conductances is studied within the one-loop accuracy renormalization group approach. While at low level of disorder the dependence of conductivity on log T is nonuniversal (it depends on details of the array's geometry), for strong disorder this dependence is described by a universal nonlinear function, which depends only on the array's dimensionality. In two dimensions this function is found numerically. The dimensional crossover in granular films is discussed.
- Publication:
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Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- May 2006
- DOI:
- 10.1134/S0021364006050067
- arXiv:
- arXiv:cond-mat/0602088
- Bibcode:
- 2006JETPL..83..211A
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Disordered Systems and Neural Networks
- E-Print:
- 6 pages, 6 figures, submitted to JETP Letters