Spin-dependent transport for a two-dimensional electron gas with magnetic barriers |
| |
Authors: | Wang Hai-Yan Duan Zi-Gang Liao Wen-Hu and Zhou Guang-Hui |
| |
Institution: | Department of Physics, Hunan Normal University, Changsha 410081, China; Institute of Optoelectronics, Shenzhen University, Shenzhen 518060, China |
| |
Abstract: | The spin-dependent conductance and magnetoresistance ratio
(MRR) for a semiconductor heterostructures consisting of two
magnetic barriers with different height and space have been
investigated by the transfer-matrix method. It is shown that the
splitting of the conductance for parallel and antiparallel
magnetization configurations results in tremendous spin-dependent
MRR, and the maximal MRRs reach 5300\% and 3800\% for the magnetic
barrier spaces W=81.3 and 243.9~nm, respectively. The obtained
spin-filtering transport property of nanostructures with magnetic
barriers may be useful to magnetic-barrier-based spintronics. |
| |
Keywords: | semiconductor 2DEG magnetic barriers spin-dependent
transport |
本文献已被 CNKI 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|