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On The Optimized Mixing of Order and Disorder in High-Tc Ceramic Superconductors

Published online by Cambridge University Press:  28 February 2011

E. Mezzelli
E. Mezzelli*
Affiliation:
Politecnico di Torino - Dipartimento di Fisica - C.so Duca degli Abruzzi, 24 - 10129 TORINO -, ITALY
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 403
Copyright
Copyright © Materials Research Society 1990

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References

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