Strain modulation of transport criticality in heterogeneous solids

Details Strain modulation of transport criticality in heterogeneous solids Strain modulation of transport criticality in heterogeneous solids

2004-03-12

arxiv.org/abs/cond-mat/0403317v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 3 eps figures

Scientific paper

A vast class of disordered conducting-insulating compounds close to the percolation threshold is characterized by nonuniversal values of transport critical exponents. The lack of universality implies that critical indexes may depend on material properties such as the particular microstructure or the nature of the constituents, and that in principle they can be influenced by suitable applied perturbations leading to important informations about the origin of nonuniversality. Here we show that in RuO$_2$-glass composites the nonuniversal exponent can be modulated by an applied mechanical strain, signaled by a logarithmic divergence of the piezoresistive response at the percolation threshold. We interpret this phenomenon as being due to a tunneling-distance dependence of the transport exponent, supporting therefore a theory of transport nonuniversality proposed some years ago.

Affiliated with

Also associated with

No associations

Rating

Strain modulation of transport criticality in heterogeneous solids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Strain modulation of transport criticality in heterogeneous solids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strain modulation of transport criticality in heterogeneous solids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-161217