Memorias de investigación
Artículos en revistas:
Resonant behaviour of the barrier of YBa2Cu3O7 grain boundary Josephson junctions fabricated on bicrystalline substrates with different geometries
Año:2012
Áreas de investigación
  • Fisica sb -- semiconductores y estructura de bandas,
  • Industria electrónica y electrotécnica
Datos
Descripción
We have analyzed a resonant behavior in the dielectric constant associated to the barrier of YBa2Cu3O7 (YBCO) grain boundary Josephson junctions (GBJJs) fabricated on a wide variety of bicrystalline substrates: 12? [001] tilt asymmetric, 24? [001] tilt asymmetric, 24? [001] tilt symmetric, 24? [100] tilt asymmetric, 45? [100] tilt asymmetric and 24? [001] tilt symmetric +45? [100] tilt asymmetric bicrystals. The resonance analysis allows us to estimate a more appropriate value of the relative dielectric constant, and so a more adequate value for the length L of the normal N region assuming a SNINS model for the barrier. In this work, the L dependence on the critical current density Jc has been investigated. This analysis makes possible a single representation for all the substrate geometries independently on around which axes the rotation is produced to generate the grain boundary. On the other hand, no clear evidences exist on the origin of the resonance. The resonance frequency is in the order of 1011 Hz, pointing to a phonon dynamic influence on the resonance mechanism. Besides, its position is affected by the oxygen content of the barrier: a shift at low frequencies is observed when the misorientation angle increases
Internacional
Si
JCR del ISI
Si
Título de la revista
Physica C-Superconductivity And Its Applications
ISSN
0921-4534
Factor de impacto JCR
1,014
Información de impacto
Volumen
483
DOI
Número de revista
Desde la página
195
Hasta la página
200
Mes
SIN MES
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Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Acústica Arquitectónica
  • Departamento: Física e Instalaciones Aplicadas a la Edificación, al Medio Ambiente y al Urbanismo