Depression of the interlayer Josephson coupling in Bi2Sr2CaCu2O8+x single crystals by spin-polarized current injection along the c-axis
✍ Scribed by Ho-Seop Shin; Hu-Jong Lee
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 262 KB
- Volume
- 408-410
- Category
- Article
- ISSN
- 0921-4534
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✦ Synopsis
We studied the effect of spin-injection on tunneling conduction properties of intrinsic Josephson junctions (IJJs) formed in Bi 2 Sr 2 CaCu 2 O 8þx single crystals. Properties of an identical stack (10 • 5 • 0.030 lm 3 ) of IJJs were compared for the bias current injection through Au and Co electrodes. Clear quasiparticle branches in tunneling current-voltage (I-V ) curves from the IJJs in the stack were observed for an unpolarized bias current through the Au electrode. Spininjection through the Co electrode caused pair breaking in the CuO 2 double layers, which led to reduction of the Josephson critical current and the superconducting gap revealed in the tunneling I-V curves.