论文标题
库珀对分离器中的本地和非本地两电子隧穿过程
Local and non-local two-electron tunneling processes in a Cooper pair splitter
论文作者
论文摘要
我们测量局部Andreev，非本地Andreev和弹性共同工艺的隧道速率和耦合系数。引起库珀对分裂的非本地Andreev工艺表现出与弹性共同隧道相同的耦合系数，而局部Andreev工艺比相应的非局部性相同。理论估计值描述了由于电子扩散与超导体和隧道连接透明性之间的竞争而引起的非本地和局部耦合的发现，并解释了非本地和局部耦合的巨大差异。
We measure the tunneling rates and coupling coefficients for local Andreev, non-local Andreev and elastic cotunneling processes. The non-local Andreev process, giving rise to Cooper pair splitting, exhibits the same coupling coefficient as the elastic co-tunneling whereas the local Andreev process is more than two orders of magnitude stronger than the corresponding non-local one. Theory estimates describe the findings and explain the large difference in the non-local and local coupling arising from competition between electron diffusion in the superconductor and tunnel junction transparency.
