INVESTIGADORES
CONDAT Carlos Alberto
artículos
Título:
Green functions and impurities in harmonic chains
Autor/es:
D.P. PRATO; C.A. CONDAT
Revista:
AMERICAN JOURNAL OF PHYSICS
Editorial:
American Association of Physics Teachers
Referencias:
Año: 1983 vol. 51 p. 140 - 145
ISSN:
0002-9505
Resumen:
The density of vibrational states of harmonic chains is calculated with the Green function formalism. Chains with impurities are considered, and it is explicitly shown how the localized states are built up from the contribution of every lattice site to the density of states. The method can be used, with slight changes, to study the dynamics of a linear ferromagnetic lattice with nearest-neighbor interactions. The procedure employed in this article shows clearly the power and simplicity of the Green function method.
