Spintronics with NSN junction of one-dimensional quantum wires: A study of pure spin current and magnetoresistance
Spintronics with NSN junction of one-dimensional quantum wires: A study of pure spin current and magnetoresistance
复制标题
一维量子线 NSN 结的自旋电子学：纯自旋电流和磁阻的研究
DOI：
10.1209/0295-5075/81/67001
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
A. Saha
中科院分区：
文献类型：
--
作者：
Sourin Das;Sumathi Rao;A. Saha
我们演示了通过由正常金属-超导体-正常金属组成的超导结产生纯自旋电流和大隧穿磁阻比的可能场景，其中正常金属是一维相互作用的量子线。我们证明了理论中存在与纯自旋电流情况相对应的不动点。我们分析了电子-电子相互作用的影响，看看它是如何稳定或破坏纯自旋电流的产生的。这些不动点对于一维量子线的正常金属-超导体-正常金属结的自旋电子学应用具有直接的实验意义。我们还计算了正交Andreev反射增强的正常金属-超导体-正常金属结隧穿磁电阻比的幂律温度依赖性。
We demonstrate possible scenarios for production of pure spin current and large tunnelling magnetoresistance ratios from elastic co-tunnelling and crossed Andreev reflection across a superconducting junction comprising of normal-metal–superconductor–normal-metal, where, the normal metal is a one-dimensional interacting quantum wire. We show that there are fixed points in the theory which correspond to the case of pure spin current. We analyze the influence of electron-electron interaction and see how it stabilizes or de-stabilizes the production of pure spin current. These fixed points can be of direct experimental relevance for spintronics application of normal-metal–superconductor–normal-metal junctions of one-dimensional quantum wires. We also calculate the power law temperature dependence of the crossed Andreev reflection enhanced tunnelling magnetoresistance ratio for the normal-metal–superconductor–normal-metal junction.