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

详细信息    查看全文

• 作者：N Sadeghi ; S A Ketabi ; N Shahtahmassebi ; M R Abolhassani
• 关键词：Spin ; polarized transport ; Polyacetylene ; Soliton–antisoliton pair ; Green’s function method
• 刊名：Indian Journal of Physics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：90
• 期：2
• 页码：195-200
• 全文大小：587 KB
• 参考文献：[1]D S Goodsell Bionanotechnology: Lessons From Nature (USA: Wiley) (2004)CrossRef
  [2]A L Botelho and X Lin Polymer Preprints 50 201 (2009)CrossRef
  [3]H Dalgleish and G Kirczenow Phys. Rev. B 72 184407 (2005)ADS CrossRef
  [4]H Guichao, G Ying, W Jianhua and X Shijie Phys. Rev. B 75 165321 (2007)CrossRef
  [5]H Guichao, H Keliang, X Shijie and A Saxena J. Chem. Phys. 129 234708 (2008)CrossRef
  [6]S A Ketabi and M Ashhadi Phys. E 53 150 (2013)CrossRef
  [7]M Ashhadi, S A Ketabi, N Shahtahmasebi, D V Fakhrabad and M Askari Phys. E 43 924 (2011)CrossRef
  [8]S J Sun Eur. Phys. J. B 72 423 (2009)ADS CrossRef
  [9]S A Ketabi, D Vahedi and H F Khozestani Phys. Scr. 83 015802 (2011)ADS CrossRef
  [10]H Jiang, G Hu, Y Guo and S Xie Org. Elec. 10 809 (2009)CrossRef
  [11]S J Luo, G Y Guo and A Laref Europhys. Lett. 77 1 (2007)CrossRef
  [12]W Li, H Huang, Y Li and J Deng Poly. Chem. 5 1107 (2014)CrossRef
  [13]J M DeTeresa Physics 2 13 (2009)CrossRef
  [14]A J Heeger, S Kivelson, J R Schrieffer and W P Su Rev. Mod. Phys. 60 781 (1988)ADS CrossRef
  [15]W P Su, J R Schrieffer and A J Heeger Phys. Rev. Lett. 42 1698 (1979)ADS CrossRef
  [16]W P Su, J R Schrieffer and A J Heeger Phys. Rev. B 22 2099 (1980)ADS CrossRef
  [17]I Gontia and et al. Synth. Met. 116 91 (2001)CrossRef
  [18]L Yu Solitons and Polarons in Conducting Polymers (Singapore: World Scientific Publications) (1988)
  [19]W Barford Electronic and Optical properties of Conjugated Polymers (Oxford: Clarendon Press) (2005)
  [20]W P Su, J R Schrieffer and A J Heeger Phys. Rev. B 28 1138 (1983)ADS CrossRef
  [21]S Roth and D Carroll One Dimensional Metals (Germany: WILEY-VCH Verlag GmbH & Co. KGaA Weinheim) p 98 (2004)CrossRef
  [22]H W Streitwolf Phys. Stat. Soli. 127 11 (1985)ADS CrossRef
  [23]S Kuroda Appl. Mag. Res. 23 455 (2003)CrossRef
  [24]K R Subbaswamy and M Grabowski Phys. Rev. B 24 15 (1981)CrossRef
  [25]V Monev, M Spassova and B Champagne Charge Distributions in Polyacetylene Chains Containing a Positively Charged Defect (USA: Wiley) (2005)
  [26]G Hu, Y Guo, J Wei and S Xie Phys. Rev. B 75 165321 (2007)ADS CrossRef
  [27]D V Fakhrabad, N Shahtahmassebi, M Askari, M Ashhadi and S A Ketabi Phys. E 43 620 (2010)CrossRef
  [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)CrossRef
  [29]M Modarresi, M R Roknabadi and N Shahtahmassebi Phys. E 44 1214 (2012)CrossRef
  [30]H S Nalwa Handbook of Organic Conductive Molecules and Polymers (USA: Wiley) Vol 3 (1997)
  [31]K R Subbaswamy and M Grabowski Phys. Rev. B 24 2168 (1981)ADS CrossRef
  [32]S Datta Electronic Transport in Mesoscopic Systems (Cambridge University Press, Cambridge) (1997)
  [33]S Datta Quantum Transport: Atom to Transistor (Cambridge University Press, Cambridge) (2005)CrossRef
  [34]L Xin-Qi and Y Yan, Appl. Phys. Lett. 79 2190 (2001)ADS CrossRef
  [35]J L D’Amato and H M Pastawski Phys. Rev. B 41 7411 (1990)ADS CrossRef
  
• 作者单位：N Sadeghi (1)
  S A Ketabi (2)
  N Shahtahmassebi (3)
  M R Abolhassani (1)
  
  1. Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran
  2. School of Physics, Damghan University, Damghan, Iran
  3. Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  Astronomy, Astrophysics and Cosmology
  Physics
  
• 出版者：Springer India
• ISSN：0974-9845

文摘

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.