The spin-dependent transport of Co-encapsulated Si nanotubes contacted with Cu electrodes
The spin-dependent transport of Co-encapsulated Si nanotubes contacted with Cu electrodes
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DOI：
10.1063/1.4865589
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发表时间：
2014-02
影响因子：
4
通讯作者：
Yanhua Guo;Xiaohong Yan;Y. Xiao
中科院分区：
文献类型：
--
作者：
Yanhua Guo;Xiaohong Yan;Y. Xiao
与碳纳米管不同，硅纳米管很难形成。然而，它们可以通过金属封装来稳定。利用第一性原理计算，我们研究了与Cu电极接触的共封装Si纳米管的自旋相关电子输运。对于有限管，随着管长增加，传输由自旋不极化变为自旋极化。进一步分析表明，除了电极对Co磁性的筛选外，自旋不对称Co-Co相互作用也是其物理机制。由于铜和硅是半导体工业的基本元素，我们的研究结果可能对硅基自旋电子器件的发展有所启发。
Unlike carbon nanotubes, silicon ones are hard to form. However, they could be stabilized by metal-encapsulation. Using first-principles calculations, we investigate the spin-dependent electronic transport of Co-encapsulated Si nanotubes, which are contacted with Cu electrodes. For the finite tubes, as the tube-length increases, the transmission changes from spin-unpolarized to spin-polarized. Further analysis shows that, not only the screening of electrodes on Co's magnetism but also the spin-asymmetric Co-Co interactions are the physical mechanisms. As Cu and Si are the fundamental elements in semiconductor industry, our results may throw light on the development of silicon-based spintronic devices.