| Автор | Andrzej Kolek |
| Дата выпуска | 1999-09-06 |
| dc.description | A random mixture of two components is considered. It is assumed that both these components have current-voltage characteristics which contain weak nonlinear terms of a power-law type. General results for the effective nonlinear susceptibility as well as for critical current and voltage, defined as the crossovers from linear to nonlinear behaviour are obtained, both above and below the percolation threshold. They agree with the results obtained previously for some less general composites. New results for the mixture of `nonlinear insulator'+`linear metal' are found. All these results are valid in the low-field limit. For larger fields it is shown that the exponent x describing the scaling of critical current as a function of conductance obeys the relation: x(d-1)/t for a random metal-insulator composite and x1-/q for a superconductor-normal conductor composite (d is dimensionality, is the percolation correlation length exponent and t and q are conductivity critical exponents for metal-insulator and superconductor-normal conductor percolation, respectively). |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Critical currents and voltages in weakly nonlinear inhomogeneous media |
| Тип | paper |
| DOI | 10.1088/0953-8984/11/35/317 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 11 |
| Первая страница | 6815 |
| Последняя страница | 6821 |
| Аффилиация | Andrzej Kolek; Department of Electronic Fundamentals, Rzeszów University of Technology, Wincentego Pola 2, 35-959 Rzeszów, Poland |
| Выпуск | 35 |
