Pandey P, Danneau R, Beckmann D
Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe D-76021, Germany.
Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology, Karlsruhe D-76021, Germany.
Phys Rev Lett. 2021 Apr 9;126(14):147701. doi: 10.1103/PhysRevLett.126.147701.
We report an experimental study of a Cooper pair splitter based on ballistic graphene multiterminal junctions. In a two transverse junction geometry, namely the superconductor-graphene-superconductor and the normal metal-graphene-normal metal, we observe clear signatures of Cooper pair splitting in the local as well as nonlocal electronic transport measurements. Our experimental data can be very well described by our beam splitter model. These results open up possibilities to design new entangled state detection experiments using ballistic Cooper pair splitters.
我们报告了一项基于弹道石墨烯多端结的库珀对分束器的实验研究。在两种横向结几何结构中，即超导体 - 石墨烯 - 超导体和正常金属 - 石墨烯 - 正常金属，我们在局部以及非局部电子输运测量中观察到了库珀对分裂的清晰特征。我们的实验数据可以通过我们的分束器模型得到很好的描述。这些结果为使用弹道库珀对分束器设计新的纠缠态检测实验开辟了可能性。
