Superexchange interaction enhancement of the quantum transport in a DNA-type molecule

doi:10.1088/1674-1056/20/11/117201

中国物理B ›› 2011, Vol. 20 ›› Issue (11): 117201-117201.doi: 10.1088/1674-1056/20/11/117201

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Superexchange interaction enhancement of the quantum transport in a DNA-type molecule

王瑞, 张存喜, 周运清, 孔令民

Physics Department, Zhejiang Ocean University, Zhoushan 316000, China

收稿日期:2011-07-06 修回日期:2011-08-31 出版日期:2011-11-15 发布日期:2011-11-15
基金资助:
Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant Nos. Y6110250 and Y201018926).

Superexchange interaction enhancement of the quantum transport in a DNA-type molecule

Wang Rui(王瑞)^†, Zhang Cun-Xi(张存喜), Zhou Yun-Qing(周运清), and Kong Ling-Min(孔令民)

Physics Department, Zhejiang Ocean University, Zhoushan 316000, China

Received:2011-07-06 Revised:2011-08-31 Online:2011-11-15 Published:2011-11-15
Supported by:
Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant Nos. Y6110250 and Y201018926).

摘要/Abstract

摘要： We use the transfer matrix method and the Green function technique to theoretically study the quantum tunnelling through a DNA-type molecule. Ferromagnetic electrodes are used to produce the spin-polarized transmission probability and therefore the spin current. The distance-dependent crossover comes from the topological variation from the one-dimensional to the two-dimensional model transform as we switch on the interstrand coupling; a new base pair will present N-1 extrachannels for the charge and spin as N being the total base pairs. This will restrain the decay of the transmission and improve the stability of the quantum transport. The spin and charge transfer through the DNA-type molecule is consistent with the quantum tunneling barrier.

Abstract: We use the transfer matrix method and the Green function technique to theoretically study the quantum tunnelling through a DNA-type molecule. Ferromagnetic electrodes are used to produce the spin-polarized transmission probability and therefore the spin current. The distance-dependent crossover comes from the topological variation from the one-dimensional to the two-dimensional model transform as we switch on the interstrand coupling; a new base pair will present N-1 extrachannels for the charge and spin as N being the total base pairs. This will restrain the decay of the transmission and improve the stability of the quantum transport. The spin and charge transfer through the DNA-type molecule is consistent with the quantum tunneling barrier.

Key words: quantum transport, DNA, superexchange

中图分类号: (Spin polarized transport)

72.25.-b

73.21.La (Quantum dots) 87.14.gk (DNA) 72.80.Le (Polymers; organic compounds (including organic semiconductors))

王瑞, 张存喜, 周运清, 孔令民. Superexchange interaction enhancement of the quantum transport in a DNA-type molecule[J]. 中国物理B, 2011, 20(11): 117201-117201.

Wang Rui(王瑞), Zhang Cun-Xi(张存喜), Zhou Yun-Qing(周运清), and Kong Ling-Min(孔令民) . Superexchange interaction enhancement of the quantum transport in a DNA-type molecule[J]. Chin. Phys. B, 2011, 20(11): 117201-117201.

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Superexchange interaction enhancement of the quantum transport in a DNA-type molecule

Superexchange interaction enhancement of the quantum transport in a DNA-type molecule

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