Nonlinear I-V Characteristics of the Granular PrBa2Cu3O7-δ Compound

Juhn-Jong Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We have measured the current-voltage {TV) curves in the granular PrBa2Cu3O7_δ compound. We find that they are nonlinear when the bias is high enough. The experimental curves can be well described by I=Σ0 V+Σ1 Vb, where Σ0 is the linear conductance, Σ1 is the high-order conductance, and the degree of the nonlinear term is found to be either b = 2 or 3. We observe that the critical current, IC, at which the nonlinear contribution becomes comparable with the linear contribution, scales with Σ0 as Ic≍ Σ0x, with x=0.56 -0.02 for the two cases b = 2 and 3. We also observe that Σ1 scales with Σ0 as Σ1≍Σ;0y, with y=1.43 -0.05 (for b=2) or 1.92-0.06 (for b=3). These experimental values of x and y are in line with the theoretical prediction based on a nonlinear-random-resistor-network model.

Original languageEnglish
Pages (from-to)4125-4132
Number of pages8
JournalJournal of the Physical Society of Japan
Issue number11
StatePublished - 15 Nov 1992


  • critical current
  • granular structure
  • high-order conductance
  • nonlinear I-V characteristics
  • percolation
  • PrBa2Cu3O7-δ compound
  • random resistor networks
  • scaling

Fingerprint Dive into the research topics of 'Nonlinear I-V Characteristics of the Granular PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>-δ Compound'. Together they form a unique fingerprint.

Cite this