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Brouers, F.; Rest, J.V. der
Proceedings of the Latin American Symposium on Physics of Amorphous Systems. v. 11985
Proceedings of the Latin American Symposium on Physics of Amorphous Systems. v. 11985
AbstractAbstract
[en] We have computed the electron density of States of solid solutions of vanadium based transition metal alloys V90X10 by using the tight-binding recursion method for degenerate d-bands in order to calculte the alloy superconducting transition temperature with the McMillan formula. As observed experimentally for X on the left hand side of V in the periodic table one obtains an increase of Tc while for X on the right hand side of V the critical temperature decreases. The detailed comparison with experiments indicate that when the bandwidths of the two constituents are different, one cannot neglect the variation of the electron-phonon interactions. (author)
[pt]
Foram computadas as densidades de estado de eletrons de solucoes solidas de ligas de metais de transicao baseadas em Vanadio V90X10 usando-se o metodo de recorrencia 'tight-binding' para bandas-d. degeneradas a fim de se calcular a temperatura de transicao de supercondutividade da liga com a formula de McMillan. Pode-se observar experimentalmente que para X no lado esquerdo de V na Tabela periodica, obtem-se um aumento na temperatura Tc enquanto que para X no lado direito, a temperatura critica decresce. Uma comparacao detalhada com a experiencia indica que quando as larguras de banda dos dois componentes sao diferentes pode-se negligenciar a interacao eletron-foton. (autor)Source
Anda, E.V. (Universidade Federal Fluminense, Niteroi, RJ (Brazil)); Centro Latino Americano de Fisica (CLAF), Rio de Janeiro, RJ (Brazil); 270 p; 1985; p. 176-185; Latin American Symposium on Physics of Amorphous Systems; Niteroi, RJ (Brazil); 27 Feb - 2 Mar 1984
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