Crossed Andreev reflection versus electron transfer in graphene nanoribbons
arXiv:0909.4654 · doi:10.1103/PhysRevB.81.174523
Abstract
We investigate the transport properties of three-terminal graphene devices, where one terminal is superconducting and two are normal metals. The terminals are connected by nanoribbons. Electron transfer (ET) and crossed Andreev reflection (CAR) are identified via the non-local signal between the two normal terminals. Analytical expressions for ET and CAR in symmetric devices are found. We compute ET and CAR numerically for asymmetric devices. ET dominates CAR in symmetric devices, but CAR can dominate ET in asymmetric devices, where only the zero-energy modes of the zigzag nanoribbons contribute to the transport.
10 pages, 9 figures
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- Even-odd effects in NSN scattering problems: Application to graphene nanoribbons
- Crossed Andreev reflection in topological insulator nanowire T-junctions
- Superconducting electron and hole lenses
- Robust Majorana bound state in pseudo-spin domain wall of 2-D topological insulator
- Long-range Cooper pair splitting by chiral Majorana edge states