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arXiv 0908.2857cond-mat.mes-hallcond-mat.mtrl-sci
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通过量子异质结构的选择性自旋输运:转移矩阵方法

Selective spin transport through a quantum heterostructure: Transfer matrix method

Moumita Dey, Santanu K. Maiti

摘要:

在目前的工作中,我们提出了一个一维的量子异质结构组成的磁性和非磁性原子网站可以用作自旋过滤器,适用于广泛的偏置电压。给出了一个简单的紧束缚框架来描述异质结耦合到两个半无限一维非磁性电极的导电结。基于传输矩阵方法,所有的计算都是数值计算的,描述了两端自旋相关的传输几率以及通过导线的结电流。我们的详细分析可能提供在一维异质结构在纳米尺度上的选择性自旋输运现象的基本方面。

英文摘要:

In the present work we propose that a one-dimensional quantum heterostructure composed of magnetic and non-magnetic atomic sites can be utilized as a spin filter for a wide range of applied bias voltage. A simple tight-binding framework is given to describe the conducting junction where the heterostructure is coupled to two semi-infinite one-dimensional non-magnetic electrodes. Based on transfer matrix method all the calculations are performed numerically which describe two-terminal spin dependent transmission probability along with junction current through the wire. Our detailed analysis may provide fundamental aspects of selective spin transport phenomena in one-dimensional heterostructures at nano-scale level.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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