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Published on: March 13, 2019
Spin-polarized transport through a quantum ring with an embedded protein-like single-helical molecule
Xiao Wang1, Hai-Na Wu1, Wei-Jiang Gong1
1College of Sciences, Northeastern University, Shenyang 110819, China.
Abstract:
We investigate the spin-polarized electron transport through a quantum ring whose arms are embedded by one protein-like single-helical molecule and one quantum dot, respectively. It is found that the inter-arm quantum interference leads to the enhancement of the spin polarization in this structure. Moreover, when local magnetic flux is applied through the ring, the spin polarization in the electron transport process, including the polarization strength and direction, can be further adjusted. Next in the finite-bias case, the spin polarization is also apparent and can be tuned by changing the magnetic flux or the dot level. This work provides a new scheme to manipulate the spin transport based on the single-helical molecule.
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