Crossed Andreev reflection in graphene-basedferromagnet-superconductor structures |
| |
Authors: | Y.-L. Yang C. Bai X.-D. Zhang |
| |
Affiliation: | 1. Department of Physics, Beijing Normal University, 100875, Beijing, P.R. China
|
| |
Abstract: | We report a theoretical investigation of the spin-polarized transport of relativistic electrons through a three-terminal graphene-based superconductor bipolar transistor with ferromagnetic leads. It is found that the magnetoresistance in such a system can be improved largely in comparison with that in the corresponding two-terminal structure due to the existence of the special crossed Andreev reflection, which is quite different from that in the conventional three-terminal ferromagnet-superconductor devices. The physical origination for such a phenomenon has also been analyzed. We also find that the non-local conductivity can not only exhibit different feature for parallel and antiparallel alignment, it is also easily tuned by the external magnetic field and the bias voltage. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|