Electronic collective transport in disordered array of C49-phase TiSi2 nanocrystals in Si

Ruffino, F.; Piro, A. M.; Piccitto, G.; Grimaldi, M. G.
January 2007
Journal of Applied Physics;1/15/2007, Vol. 101 Issue 2, p024316
Academic Journal
We have studied the longitudinal electronic collective transport properties in a disordered array of TiSi2 nanocrystals (with surface density of 1012 cm-2) embedded in Si polycrystalline matrix as a function of temperature. The system is characterized by a high degree of disorder compared to the standard disordered nanocrystal array usually studied in the literature. Despite of this fundamental difference, we demonstrate that the theoretical models used to describe the collective electronic transport in standard systems are adequate to describe the electrical behavior of such a “nonstandard” system. In particular, we show that two different conduction regimes, separated by a crossover temperature T*, exist: at T


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