| Autor: |
Horst Rogalla, A. G. Sivakov, F.J.G. Roesthuis, G.J. Gerritsma, Y.M. Boguslavskij, K. Joosse |
| Přispěvatelé: |
Faculty of Science and Technology |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Physica C, 220(1-2), 195-202. Elsevier |
| ISSN: |
0921-4534 |
| DOI: |
10.1016/0921-4534(94)90901-6 |
| Popis: |
The modulation of the supercurrent Is of a YBCO bridge by the quasiparticle-injection current IG from the YBCO/Au or YBCO/PBCO/Au junctions at temperatures of 60–85 K is determined by two effects: (1) summation of the currents IS and IG in the YBCO bridge, and (2) nonequilibrium suppression of IS by the quasiparticle injection. At a thickness of the PBCO barrier of 40 nm the modulation of IS can be described by the current-summation effect only. For YBCO/Au structures the current gain δIS/δIG increases linearly with decreasing temperature, reaching the value of 2 at 60 K. Numerical simulations of the current- voltage characteristics show an increase of the effective temperature T∗ of the YBCO bridge under injection only at small thicknesses of the PBCO barrier. Visualization of the voltage drop over the junction area by laser scanning microscopy shows a qualitative agreement with the electrical measurements with respect to the current summation and nonequilibrium effects. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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