Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Resonant behaviour of the barrier of YBa2Cu3O7 grain boundary Josephson junctions fabricated on bicrystalline substrates with different geometries
Year:2012
Research Areas
  • Physics - Semiconductors and band structure,
  • Electronics and electrical engineering
Information
Abstract
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
International
Si
JCR
Si
Title
Physica C-Superconductivity And Its Applications
ISBN
0921-4534
Impact factor JCR
1,014
Impact info
Volume
483
Journal number
From page
195
To page
200
Month
SIN MES
Ranking
Participants
  • Autor: M. de los Angeles Navacerrada Saturio (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Acústica Arquitectónica
  • Departamento: Física e Instalaciones Aplicadas a la Edificación, al Medio Ambiente y al Urbanismo
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)