期刊
PHYSICAL REVIEW B
卷 80, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.014513
关键词
exchange interactions (electron); Fermi level; Fermi surface; ferromagnetic materials; graphene; magnetic switching; magnetisation; noise; spin valves; superconductive tunnelling
资金
- Norwegian Research Council [158518/431, 158547/431, 167498/V30]
We consider the nonlocal quantum transport properties of a graphene superconducting spin valve. It is shown that one may create a spin-switch effect between perfect elastic cotunneling (CT) and perfect crossed Andreev reflection (CAR) for all bias voltages in the low-energy regime by reversing the magnetization direction in one of the ferromagnetic layers. This opportunity arises due to the possibility of tuning the local Fermi level in graphene to values equivalent to a weak magnetic exchange splitting, thus reducing the Fermi surface for minority spins to a single point and rendering graphene to be half metallic. Such an effect is not attainable in a conventional metallic spin valve setup, where the contributions from CT and CAR tend to cancel each other and noise measurements are necessary to distinguish these processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据