On the Inequivalence of Weak-Localization and Coherent Backscattering

Details On the Inequivalence of Weak-Localization and Coherent Backscattering On the Inequivalence of Weak-Localization and Coherent Backscattering

1994-05-26

arxiv.org/abs/cond-mat/9405080v1

Physics

Condensed Matter

24 pages revtex + 12 figures on request; hub.94.2

Scientific paper

10.1103/PhysRevB.50.8230

We define a current-conserving approximation for the local conductivity tensor of a disordered system which includes the effects of weak localization. Using this approximation we show that the weak localization effect in conductance is not obtained simply from the diagram corresponding to the coherent back-scattering peak observed in optical experiments. Other diagrams contribute to the effect at the same order and decrease its value. These diagrams appear to have no semiclassical analogues, a fact which may have implications for the semiclassical theory of chaotic systems. The effects of discrete symmetries on weak localization in disordered conductors is evaluated and and compared to results from chaotic scatterers.

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