Diffusion of intrinsic defects in dielectric and semiconductor crystals with impurities |
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Authors: | E. M. Akulenok Kh. S. Bagdasarov Yu. K. Danileiko T. P. Lebedeva A. A. Manenkov |
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Affiliation: | (1) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333, Russia;(2) Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 117942, Russia |
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Abstract: | This paper reports on the results of detailed theoretical investigations into the diffusion of intrinsic defects in impurity crystals doped with mixed-valence ions. The special case of diffusion stimulated by variations in the redox properties of the atmosphere at the crystal boundary during high-temperature annealing is analyzed. The major consideration is given to the following fundamental problems: (i) the dynamics of valence transitions and the structure of the chemical reaction zone, (ii) the possibility of determining the type of chemical reaction at the crystal-atmosphere interface and the type of diffusing defects, (iii) the effect of dilatation mechanical stresses arising in the reaction zone on the reaction-zone structure and on the dynamics of diffusion processes, and (iv) the determination of the diffusion parameters of intrinsic defects and the constants of their interaction with impurity centers. |
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