Manifestation of π-contacts in magnetic field dependence of I - V characteristics for proximity-type 2D Josephson junction array

Victor Anthony Garcia Rivera, S. Sergeenkov, E. Marega, F. M. Araújo-Moreira

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Results on the temperature and magnetic field dependence of current-voltage characteristics (CVC) are presented for SNS-type 2D ordered array of Nb-Cu0.95Al0.05-Nb junctions. The critical current IC (T, H) and the power exponent a (T, H) = 1 + Φ0 IC (T, H) / 2 kB T of the nonlinear CVC law V = R [I - IC (T, H)]a (T, H) are found to have a maximum at non-zero value of applied magnetic field Hp = 225   Oe, which is attributed to manifestation of π-type Josephson contacts in our sample.

Original languageEnglish
Pages (from-to)376-379
Number of pages4
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume374
Issue number2
DOIs
StatePublished - 28 Dec 2009
Externally publishedYes

Bibliographical note

Funding Information:
We are very grateful to R.S. Newrock, P. Barbara and C.J. Lobb for helpful discussions and for providing SNS samples. This work has been financially supported by the Brazilian agencies CNPq, CAPES and FAPESP.

Keywords

  • Current-voltage characteristics
  • Josephson junction arrays
  • Proximity effect
  • π-type Josephson contacts

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