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.Pubblicazioni consigliate
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https://hdl.handle.net/11583/1661856
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