Renormalization-group calculation of excitation properties for impurity models
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Data
1990-05-01
Autores
Yoshida, Makoto [UNESP]
Whitaker, Marisa Andreata
Oliveira, Luiz Nunes de
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American Physical Soc
Resumo
The renormalization-group method developed by Wilson to calculate thermodynamical properties of dilute magnetic alloys is generalized to allow the calculation of dynamical properties of many-body impurity Hamiltonians. As a simple illustration, the impurity spectral density for the resonant-level model (i.e., the U =0 Anderson model) is computed. As a second illustration, for the same model, the longitudinal relaxation rate for a nuclear spin coupled to the impurity is calculated as a function of temperature.
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Physical Review B. College Pk: American Physical Society, v. 41, n. 13, p. 9403-9414, 1990.