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17 January 2025

» arxiv » cond-mat/0701456

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On the origin of unusual transport properties observed in densely packed polycrystalline CaAl_{2}
S. Sergeenkov ; F.M. Araujo-Moreira ; 10.1063/1.2364667 ;
Date:	18 Jan 2007
Journal:	J. Appl. Phys. 100, 096101 (2006)
Subject:	Materials Science
Abstract:	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 $ ho 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.
Source:	arXiv, cond-mat/0701456
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