Corrections to the Boltzmann mean free path in disordered systems with finite size scatterers

Details Corrections to the Boltzmann mean free path in disordered systems with finite size scatterers Corrections to the Boltzmann mean free path in disordered systems with finite size scatterers

2001-03-06

arxiv.org/abs/cond-mat/0103131v1

J. Phys. A: Math. Gen. 34 (2001) 9349-9356

Physics

Condensed Matter

Disordered Systems and Neural Networks

12 pages

Scientific paper

10.1088/0305-4470/34/44/301

The mean free path is an essential characteristic length in disordered systems. In microscopic calculations, it is usually approximated by the classical value of the elastic mean free path. It corresponds to the Boltzmann mean free path when only isotropic scattering is considered, but it is different for anisotropic scattering. In this paper, we work out the corrections to the so called Boltzmann mean free path due to multiple scattering effects on finite size scatterers, in the s-wave approximation, ie. when the elastic mean free path is equivalent to the Boltzmann mean free path. The main result is the expression for the mean free path expanded in powers of the perturbative parameter given by the scatterer density.

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