Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-08-10
Physics
Condensed Matter
Strongly Correlated Electrons
Scheduled to appear in August 1, 2004 issue of Phys. Rev. B
Scientific paper
10.1103/PhysRevB.70.064515
A novel phenomenological approach to the analysis of the conductivities of incoherent layered crystals is presented. It is based on the fundamental relationship between the resistive anisotropy $\sigma_{ab}/\sigma_c$ and the ratio of the phase coherence lengths in the respective directions. We explore the model-independent consequences of a general assumption that the out-of-plane phase coherence length of single electrons is a short fixed distance of the order of interlayer spacing. Several topics are discussed: application of the scaling theory, magnetoresistivity, the effects of substitutions and the intermediate regime of conduction when both coherence lengths change with temperature, but at different rate.
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