On the origin of unusual transport properties observed in densely packed polycrystalline CaAl_{2}

Details On the origin of unusual transport properties observed in densely packed polycrystalline CaAl_{2} On the origin of unusual transport properties observed in densely packed polycrystalline CaAl_{2}

2007-01-18

arxiv.org/abs/cond-mat/0701456v1

J. Appl. Phys. 100, 096101 (2006)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.2364667

A possible origin of unusual temperature behavior of transport coefficients observed in densely packed polycrystalline CaAl_{2} compound [M. Ausloos et al., J. Appl. Phys. 96, 7338 (2004)] is discussed, including a power-like dependence of resistivity with $\rho \propto T^{-3/4}$ and N-like form of the thermopower. All these features are found to be in good agreement with the Shklovskii-Efros localization scenario assuming polaron-mediated hopping processes controlled by the Debye energy.

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