Depression of the interlayer Josephson coupling in Bi2Sr2CaCu2O8+x single crystals by spin-polarized current injection along the c-axis
Depression of the interlayer Josephson coupling in Bi2Sr2CaCu2O8+x single crystals by spin-polarized current injection along the c-axis
复制标题
沿 c 轴自旋极化电流注入 Bi2Sr2CaCu2O8 x 单晶中层间约瑟夫森耦合的抑制
DOI：
10.1016/j.physc.2004.03.086
复制
发表时间：
2004
影响因子：
1.7
通讯作者：
Hu
中科院分区：
文献类型：
--
作者：
Ho;Hu
研究了自旋注入对Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x}单晶中本征约瑟夫森结隧穿导电特性的影响。对于通过Au和Co电极的偏置电流注入，比较了相同的IJJ叠层（10 × 5 × 0.030 {mu}m{sup 3}）的性质。对于通过Au电极的未极化偏置电流，观察到堆叠中IJs的隧穿电流-电压（I-V）曲线中的清晰准粒子分支。通过Co电极的自旋注入导致CuO{sub 2}双层中的对断裂，这导致Josephson临界电流和隧穿I-V曲线中显示的超导能隙减小。
We studied the effect of spin-injection on tunneling conduction properties of intrinsic Josephson junctions (IJJs) formed in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} single crystals. Properties of an identical stack (10 x 5 x 0.030 {mu}m{sup 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. Spin-injection through the Co electrode caused pair breaking in the CuO{sub 2} double layers, which led to reduction of the Josephson critical current and the superconducting gap revealed in the tunneling I-V curves.