https://doi.org/10.1140/epjb/e2012-30245-5
Regular Article
Spin rotator and shot noise in graphene-based multi-barrier nanostructure
1 School of materials science and
engineering, Nanchang University, Nanchang
330031, P.R.
China
2 School of Basic Science, East China
Jiaotong University, Nanchang
330013, P.R.
China
3 School of Measuring and Optical
Engineering, Nanchang Hangkong University, Nanchang
330063, P.R.
China
a e-mail: wuqingping78519@163.com
Received:
20
March
2012
Received in final form:
4
May
2012
Published online:
18
October
2012
Based on the transfer-matrix method, the spin transport properties through a graphene-based multi-barrier nanostructure with an exchange field and Rashba spin orbit coupling (SOC), have been investigated. It is found that if Rashba SOC equals to the exchange field, the multi-barrier nanostructure is an efficient way to achieve spin rotators and spin filters. In addition, it is also found that the shot noise of a spin state can be enhanced by electrostatic potential, and plateaus of the Fano factor is formed.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2012
