Effect of disorder in specific realizations of multibarrier random systems

A resonance formalism is used to study the effect of disorder in specific realizations of multibarrier random systems. We solve the periodic case and introduce disorder by allowing random Values for the well widths. We analyze the motion of the complex poles of the S matrix on the energy plane and c...

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Detalhes bibliográficos
Autores: Romo, R, Rubio, A, GarcíaCalderon, G
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:1997
País:México
Recursos:Universidad Nacional Autónoma de México
Repositório:Sistema de Información de la Facultad de Ciencias, UNAM
OAI Identifier:oai:repositorio.fciencias.unam.mx:11154/2848
Acesso em linha:http://hdl.handle.net/11154/2848
Access Level:Acceso aberto
Palavra-chave:Physics, Condensed Matter
Descrição
Resumo:A resonance formalism is used to study the effect of disorder in specific realizations of multibarrier random systems. We solve the periodic case and introduce disorder by allowing random Values for the well widths. We analyze the motion of the complex poles of the S matrix on the energy plane and calculate the resonant states for systems of fixed length as a function of the disorder strength. Our analysis of the eigenfunctions, the decay widths, and the Thouless criterion allows us to distinguish in general three different types of states: quasilocalized, intermediate, and border states.