G 96 Gusev, A. I. Triple Correlations in a AyB1-y Solid Solution with a Planar Hexagonal Lattice / A. I. Gusev // JETP Letters. - 2008. - Vol. 87, № 5. - P248-252 : il. - Bibliogr. : p. 251-252 (24 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ТВЕРДЫЕ РАСТВОРЫ -- ГЕКСАГОНАЛЬНАЯ РЕШЕТКА -- НАНОЧАСТИЦЫ Аннотация: It is shown that triple correlations in a AyB1 –y solid solution with a planar hexagonal lattice are due to the presence of nearest-pair correlations. The admissible range of the triple correlation as a function of the composition of the AyB1 –y solid solution and pair correlation value is determined. It is shown that periodically ordered planar hexagonal and square-island nanostructures can be considered as A1/4 3/4 solid solutions with vacant sites and sites occupied by nanoparticles A. In this case, the ordered distribution of the nanoparticles over the sites of the planar lattice is caused by the nearest -air correlation that is negative in sign and maximal in absolute value Полный текст |
S 12 Sadovnikov, S. I. Simulation of Pair and Three-Particle Correlations in a Binary Solid Solution with a Hexagonal Lattice / S. I. Sadovnikov, A. A. Rempel // Physics of the Solid State. - 2008. - Vol. 50, № 6. - P1131-1136 : il. - Bibliogr. : p. 1136 (12 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ГЕКСАГОНАЛЬНАЯ РЕШЕТКА -- ТВЕРДЫЕ РАСТВОРЫ -- АТОМНАЯ СТРУКТУРА Аннотация: The correlations revealed in an AyB1 –y disordered solid solution in which atoms occupy sites in the planar hexagonal lattice are investigated. It is demonstrated that pair correlations in the first coordination shell necessarily result in the appearance of pair correlations in the second and subsequent coordination shells. These induced pair correlations decay to the tenth coordination shell. The atomic ordering in solid solutions of all compositions is studied using the computer simulation. It is shown that, within the limits of computational error, the functional dependence between the pair correlation parameter of the first coordination shell and the parameters of the induced pair correlations in the second to ninth coordination shells is described by a third-degree polynomial. The results of the computer simulation of three-particle correlations are in agreement with the analytical solution for the corresponding correlations in the first coordination shell of the hexagonal lattice Полный текст |
G 96 Gusev, A. I. Relationship between Triple and Pair Correlations in an AyB1-y Solid Solution with a Planar Hexagonal Lattice / A. I. Gusev // Physics of the Solid State. - 2008. - Vol. 50, № 12. - P2256-2260 : il. - Bibliogr. : p. 2260 (25 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ТВЕРДЫЕ РАСТВОРЫ -- ГЕКСАГОНАЛЬНАЯ РЕШЕТКА -- СТРУКТУРА АТОМНАЯ Аннотация: An analytical relationship is found between triple correlations and nearest neighbor pair correlations in an AyB1 –y solid solution with a planar hexagonal lattice (plane group p6mm). The range of variations in the triple correlation is determined as a function of the composition of the AyB1 –y solid solution and the value of the pair correlation. It is assumed that periodically ordered planar hexagonal and square island nanostructures can be considered as solid solutions A1/4 3/4with vacancy sites and sites occupied by nanoparticles A . In this case, an ordered distribution of nanoparticles over the planar-lattice sites occurs because the nearest neighbor pair correlation is negative and has a maximum magnitude Полный текст |