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Spin-polarized electron transport through magnetic poly-BIPO molecule: the role of soliton–antisoliton separation

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Abstract

Spin-polarized transport through a one-dimensional metal/poly-BIPO/metal model junction with the soliton–antisoliton separation is investigated. Nonlinear spin and charge densities are considered in magnetic poly-BIPO molecule, as a neutral soliton and charged antisoliton with different separations. The calculations are performed based on Su–Schrieffer–Heeger Hamiltonian which is extended with Heisenberg and Hubbard Hamiltonians to include the spin and electron–electron interactions. The spin-dependent transport properties are obtained within the framework of the Landauer–Büttiker formalism based on Green’s function theory. This study demonstrates the reduction in current and spin polarization as the separation between soliton and antisoliton centers is increased. We have found that when the soliton–antisoliton separation is less than 14 sites, the spin polarization is almost 100 % plato, over the voltage ranges more than 0.3 V. Also the energy differences between the soliton–antisoliton mid-gap states for up- and down-spin electrons and the Fermi energy of the system are reduced. However, for the soliton–antisoliton separation lengths more than 14 sites, these quantities tend to constant values with enhancement of the distance between the excitation centers.

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References

  1. D S Goodsell Bionanotechnology: Lessons From Nature (USA: Wiley) (2004)

    Book  Google Scholar 

  2. A L Botelho and X Lin Polymer Preprints 50 201 (2009)

    Article  Google Scholar 

  3. H Dalgleish and G Kirczenow Phys. Rev. B 72 184407 (2005)

    Article  ADS  Google Scholar 

  4. H Guichao, G Ying, W Jianhua and X Shijie Phys. Rev. B 75 165321 (2007)

    Article  Google Scholar 

  5. H Guichao, H Keliang, X Shijie and A Saxena J. Chem. Phys. 129 234708 (2008)

    Article  Google Scholar 

  6. S A Ketabi and M Ashhadi Phys. E 53 150 (2013)

    Article  Google Scholar 

  7. M Ashhadi, S A Ketabi, N Shahtahmasebi, D V Fakhrabad and M Askari Phys. E 43 924 (2011)

    Article  Google Scholar 

  8. S J Sun Eur. Phys. J. B 72 423 (2009)

    Article  ADS  Google Scholar 

  9. S A Ketabi, D Vahedi and H F Khozestani Phys. Scr. 83 015802 (2011)

    Article  ADS  Google Scholar 

  10. H Jiang, G Hu, Y Guo and S Xie Org. Elec. 10 809 (2009)

    Article  Google Scholar 

  11. S J Luo, G Y Guo and A Laref Europhys. Lett. 77 1 (2007)

    Article  Google Scholar 

  12. W Li, H Huang, Y Li and J Deng Poly. Chem. 5 1107 (2014)

    Article  Google Scholar 

  13. J M DeTeresa Physics 2 13 (2009)

    Article  Google Scholar 

  14. A J Heeger, S Kivelson, J R Schrieffer and W P Su Rev. Mod. Phys. 60 781 (1988)

    Article  ADS  Google Scholar 

  15. W P Su, J R Schrieffer and A J Heeger Phys. Rev. Lett. 42 1698 (1979)

    Article  ADS  Google Scholar 

  16. W P Su, J R Schrieffer and A J Heeger Phys. Rev. B 22 2099 (1980)

    Article  ADS  Google Scholar 

  17. I Gontia and et al. Synth. Met. 116 91 (2001)

    Article  Google Scholar 

  18. L Yu Solitons and Polarons in Conducting Polymers (Singapore: World Scientific Publications) (1988)

    Google Scholar 

  19. W Barford Electronic and Optical properties of Conjugated Polymers (Oxford: Clarendon Press) (2005)

    Google Scholar 

  20. W P Su, J R Schrieffer and A J Heeger Phys. Rev. B 28 1138 (1983)

    Article  ADS  Google Scholar 

  21. S Roth and D Carroll One Dimensional Metals (Germany: WILEY-VCH Verlag GmbH & Co. KGaA Weinheim) p 98 (2004)

    Book  Google Scholar 

  22. H W Streitwolf Phys. Stat. Soli. 127 11 (1985)

    Article  ADS  Google Scholar 

  23. S Kuroda Appl. Mag. Res. 23 455 (2003)

    Article  Google Scholar 

  24. K R Subbaswamy and M Grabowski Phys. Rev. B 24 15 (1981)

    Article  Google Scholar 

  25. V Monev, M Spassova and B Champagne Charge Distributions in Polyacetylene Chains Containing a Positively Charged Defect (USA: Wiley) (2005)

    Google Scholar 

  26. G Hu, Y Guo, J Wei and S Xie Phys. Rev. B 75 165321 (2007)

    Article  ADS  Google Scholar 

  27. D V Fakhrabad, N Shahtahmassebi, M Askari, M Ashhadi and S A Ketabi Phys. E 43 620 (2010)

    Article  Google Scholar 

  28. A S Souza, M Smeu, L Zhang, A G S Filho, H Guo and M. A. Ratner J. Am. Chem. Soc. 136 15065 (2014)

    Article  Google Scholar 

  29. M Modarresi, M R Roknabadi and N Shahtahmassebi Phys. E 44 1214 (2012)

    Article  Google Scholar 

  30. H S Nalwa Handbook of Organic Conductive Molecules and Polymers (USA: Wiley) Vol 3 (1997)

    Google Scholar 

  31. K R Subbaswamy and M Grabowski Phys. Rev. B 24 2168 (1981)

    Article  ADS  Google Scholar 

  32. S Datta Electronic Transport in Mesoscopic Systems (Cambridge University Press, Cambridge) (1997)

    Google Scholar 

  33. S Datta Quantum Transport: Atom to Transistor (Cambridge University Press, Cambridge) (2005)

    Book  Google Scholar 

  34. L Xin-Qi and Y Yan, Appl. Phys. Lett. 79 2190 (2001)

    Article  ADS  Google Scholar 

  35. J L D’Amato and H M Pastawski Phys. Rev. B 41 7411 (1990)

    Article  ADS  Google Scholar 

Download references

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Authors and Affiliations

  1. Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran

    N Sadeghi & M R Abolhassani

  2. School of Physics, Damghan University, Damghan, Iran

    S A Ketabi

  3. Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran

    N Shahtahmassebi

Authors
  1. N Sadeghi
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  2. S A Ketabi
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  3. N Shahtahmassebi
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  4. M R Abolhassani
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Correspondence to S A Ketabi.

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Sadeghi, N., Ketabi, S.A., Shahtahmassebi, N. et al. Spin-polarized electron transport through magnetic poly-BIPO molecule: the role of soliton–antisoliton separation. Indian J Phys 90, 195–200 (2016). https://doi.org/10.1007/s12648-015-0746-0

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  • DOI: https://doi.org/10.1007/s12648-015-0746-0

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