Electronic Structure of Ni Substituted <math>Y(Ni1-xMx)2B2C</math> Superconductors

Nota de FísicaPublicado

Electronic Structure of Ni Substituted $<math>Y(Ni_{1-x}M_x)2B_2C</math>$ Superconductors

Z. Zeng; D.E. Ellis; D. Guenzburger; E. M. B. Saitovitch

1995

Autores: Z. Zeng; D.E. Ellis; D. Guenzburger; E. M. B. Saitovitch
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1995
Descrição: The substitution of Ni by the transition metals Fe, Co and Ru in <math>YNi_2B_2C\!\,</math> is analyzed using the self-consistent local density embedded-cluster approach. Changes of partial densities of states, charge density, and bond order are examined to elucidate bonding structure and the interplay between covalent, ionic, and metallic interactions in these highly anisotropic superconductors. Impurity induced modifications in distribution and composition of states near the Fermi level are discussed in terms of the observed drop in <math>T_c\!\,</math>, with impurity concentration. Electric field gradients are obtained at the central site. In the case of iron substitution with concentration <math>x \leq 0.1</math>, electric quadrupole splitting is compared with Mössbauer experimental results.
Ano: 1995
Número: CBPF-NF-089/95
Vínculo com tese: Não
Vínculo com bolsa: Não