Journal
CRYSTALLOGRAPHY REPORTS
Volume 50, Issue -, Pages S58-S61Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/1.2133973
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Current-voltage characteristics of polycrystal cubic nitride samples are studied at various temperatures. The samples were undoped crystals obtained by the method of direct phase transformation of pyrolytic graphite-like boron nitride and crystals doped with sulfur to obtain n-type conductivity. The current-voltage characteristics consist of three different parts: linear and quadratic segments and the region of dramatic increase in the current, which indicates the existence of space-charge-limited currents. The activation energy, E-l, and concentration of the trapping centers, N-l, are determined. The experimental data obtained allowed us to calculate. for the first time, the mobility and concentration of free carrier in the conduction band. Possible mechanisms giving rise to a dramatic increase in are made the current on the current-voltage characteristics are discussed. (C) 2005 Pleiades Publishing, Inc.
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