Otro
Renormalization-group calculation of dynamical properties for impurity models
Registro en:
Physica B: Physics of Condensed Matter, v. 171, n. 1-4, p. 61-68, 1991.
0921-4526
10.1016/0921-4526(91)90491-V
2-s2.0-0026157471
Autor
Oliveira, L. N.
Líbero, V. L.
Frota, H. O.
Yoshida, M.
Resumen
The numerical renormalization-group method was originally developed to calculate the thermodynamical properties of impurity Hamiltonians. A recently proposed generalization capable of computing dynamical properties is discussed. As illustrative applications, essentially exact results for the impurity specttral densities of the spin-degenerate Anderson model and of a model for electronic tunneling between two centers in a metal are presented. © 1991.