Coherent excitations of localized states, represented by a selfsimilar Cayley tree, produce a gap in the density of states, which is deeper as the number of generations increases. The model can suitably describe systems in which an optimized concentration of “defects” allows self similarity of the state-tree and coherent coupling between clusters of localized states. A renormalization of the state-tree leads to a hierarchy of the energy eigenvalues.

On the optimized mixing of order and disorder in high-Tc ceramic superconductors / Mezzetti, Enrica; Gerbaldo, Roberto; Minetti, Bruno. - In: MATERIALS RESEARCH SOCIETY SYMPOSIA PROCEEDINGS. - ISSN 0272-9172. - 195:(1990), p. 45. (Intervento presentato al convegno Physical phenomena in granular materials : symposium tenutosi a San Francisco (USA) nel April 16-20, 1990) [10.1557/PROC-195-403].

On the optimized mixing of order and disorder in high-Tc ceramic superconductors

MEZZETTI, Enrica;GERBALDO, Roberto;MINETTI, Bruno
1990

Abstract

Coherent excitations of localized states, represented by a selfsimilar Cayley tree, produce a gap in the density of states, which is deeper as the number of generations increases. The model can suitably describe systems in which an optimized concentration of “defects” allows self similarity of the state-tree and coherent coupling between clusters of localized states. A renormalization of the state-tree leads to a hierarchy of the energy eigenvalues.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1661856
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo