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传导结中外部控制的高自旋极化度和自旋反转：两种新方法。

Externally controlled high degree of spin polarization and spin inversion in a conducting junction: Two new approaches.

作者信息

Patra Moumita, Maiti Santanu K

机构信息

Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 Barrackpore Trunk Road, Kolkata, 700 108, India.

出版信息

Sci Rep. 2017 Oct 30;7(1):14313. doi: 10.1038/s41598-017-14499-2.

DOI:10.1038/s41598-017-14499-2
PMID:29084987
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5662718/
Abstract

We propose two new approaches for regulating spin polarization and spin inversion in a conducting junction within a tight-binding framework based on wave-guide theory. The system comprises a magnetic quantum ring with finite modulation in site potential is coupled to two non-magnetic electrodes. Due to close proximity an additional tunneling is established between the electrodes which regulates electronic transmission significantly. At the same time the phase associated with site potential, which can be tuned externally yields controlled transmission probabilities. Our results are valid for a wide range of parameter values which demonstrates the robustness of our proposition. We strongly believe that the proposed model can be realized in the laboratory.

摘要

我们基于波导理论，在紧束缚框架内提出了两种调节导电结中自旋极化和自旋反转的新方法。该系统由一个在位势上具有有限调制的磁性量子环与两个非磁性电极耦合而成。由于距离很近，电极之间建立了额外的隧穿，这显著调节了电子传输。同时，与位势相关的相位可以外部调节，从而产生可控的传输概率。我们的结果在很宽的参数值范围内都是有效的，这证明了我们提议的稳健性。我们坚信所提出的模型可以在实验室中实现。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/75556c26ed86/41598_2017_14499_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/5cd2821b4d61/41598_2017_14499_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/97a8bb9adad9/41598_2017_14499_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/c52129c74eac/41598_2017_14499_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/6710370659fd/41598_2017_14499_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/6eeaa0b84d31/41598_2017_14499_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/503d8fdbd39d/41598_2017_14499_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/5c4cdf0d7270/41598_2017_14499_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/02d739b0d577/41598_2017_14499_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/3cacf339df8d/41598_2017_14499_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/e961abcc16b7/41598_2017_14499_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/43bb74a103b5/41598_2017_14499_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/75556c26ed86/41598_2017_14499_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/5cd2821b4d61/41598_2017_14499_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/97a8bb9adad9/41598_2017_14499_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/c52129c74eac/41598_2017_14499_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/6710370659fd/41598_2017_14499_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/6eeaa0b84d31/41598_2017_14499_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/503d8fdbd39d/41598_2017_14499_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/5c4cdf0d7270/41598_2017_14499_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/02d739b0d577/41598_2017_14499_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/3cacf339df8d/41598_2017_14499_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/e961abcc16b7/41598_2017_14499_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/43bb74a103b5/41598_2017_14499_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0278/5662718/75556c26ed86/41598_2017_14499_Fig12_HTML.jpg

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