Nonlinear I-V Characteristics of the Granular PrBa_2Cu_3O_<7-δ> Compound

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概要

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• Woe have measured the current-voltage (I-V) curves in the granv?1ar PrBa.Cu.O,-,compound. We find that they are nonlinear w'lten tlte bias is laigla enough. The ex-perimental curves can be well described by 7=I. [81. V', w'ltere I(, is the linearcoxaductance, I. is tlae high-order conductance, and Live degree of tlte nonlinear termis found to be either b=2 or 3. We observe that the critucal current, I., at which thenonlinear contribution becomes comparable with the linear contribution, scales withI. as I.: 19, with ,X'= 0.56 f 0.02 for the two cases b = 2 and 3. We also observe thatI. scales w'ith I.as I.: I;, with y= 1.43 'f0.05 (for b=2) or 1.92'f0.06 (for #=3).Tlaese experimental values of x and y are in line with tlae tlaeoretical prediction basedon a nonlinear-random-resistor-network model.[nonlinear I- V claaracteristics, critical current, high-order condv?ctance, scaling, l{ PrBa.Cu,0,-, compound, granular structure, percolation, random resistor net- [l worksl

• 社団法人日本物理学会の論文
• 1992-11-15

著者

• Lin J

  National Taiwan Univ. Taipei Twn

• Lin J.J.

  Department of Physics, Faculty of Science, University of Tokyo

関連論文

• Highly Isotropic Magnetoresistances of High Sheet-Resistance Copper-Particle Films
• Nonlinear I-V Characteristics of the Granular PrBa_2Cu_3O_ Compound

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