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Comparison of the Transition to the Insulating State in Two-Dimensional and One-Dimensional Arrays of Ultrasmall Tunnel Junctions

  • P. Delsing
  • Chiidong Chen
  • D. B. Haviland
  • T. Claeson
Conference paper
Part of the Springer Series in Electronics and Photonics book series (SSEP, volume 31)

Abstract

We have fabricated and measured a two-dimensional (2-D) and a one-dimensional (1-D) array of small aluminum tunnel junctions. The 2-D array is in a previously unexplored regime where the charging energy is much larger than the Josephson coupling energy, x=EC/EJ”l. The I-V characteristics and their dependence on temperature and magnetic field have been investigated at temperatures down to 35mK. The I-V characteristics show a large Coulomb blockade. The low voltage conductance decreases rapidly as the temperature is lowered. Comparison of the 2-D and 1-D case shows a nearly identical temperature dependence in both the superconducting and normal state. Although there is no Josephson current an oscillatory behavior corresponding to one flux quantum (h/2e) per unit cell is observed.

Keywords

Superconducting State Tunnel Junction Charge Energy Flux Quantum Coulomb Blockade 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • P. Delsing
    • 1
  • Chiidong Chen
    • 1
  • D. B. Haviland
    • 1
  • T. Claeson
    • 1
  1. 1.Department of PhysicsChalmers University of TechnologyGöteborgSweden

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