Spin Filtering in a Rashba Electron Waveguide Induced by Edge Disorder
XIAO Xian-Bo1,2 , LI Fei2 , LIU Nian-Hua1**
1 Institute for Advanced Study, Nanchang University, Nanchang 330031 2 School of Computer, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004
Abstract ：We theoretically study the spin-dependent electron transport in a Rashba electron waveguide with rough edges, attached to ideal leads without spin-orbit interaction. The influence of the edge disorder on the charge and spin conductances is clarified by using the spin-resolved lattice Green function method. It is found that a spin-polarized current can be generated in the output lead and its spin polarization can be manipulated by varying the waveguide length. The underlying physics is attributed to the broken longitudinal symmetry and the spin-dependent quantum interference induced by the rough boundaries. Our results may provide a new method to design a spin filter without using magnetic materials or applying a magnetic field.
收稿日期: 2012-03-07
出版日期: 2012-07-31
:
72.25.Dc
(Spin polarized transport in semiconductors)
73.63.Nm
(Quantum wires)
71.70.Ej
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
[1] Datta S and Sarma S Das 1990 Appl. Phys. Lett. 56 665 Sov. Phys. Solid State 2 11091984 J. Phys. C 17 6039 2000 Phys. Rev. Lett. 84 6074 2002 Phys. Rev. Lett. 89 046801 2003 Phys. Rev. B 67 161303(R) 2004 Phys. Rev. B 69 115333 2005 Phys. Rev. B 72 115321 2007 Phys. Rev. B 76 035306 2008 Phys. Rev. B 77 075303 2008 J. Appl. Phys. 103 123703 2009 Phys. Rev. B 80 125311 2005 Phys. Rev. B 72 041308(R) 2005 Phys. Rev. B 71 155321 2007 J. Phys: Condens. Matter 19 016209 2007 J. Appl. Phys. 101 063704 2009 Phys. Rev. B 80 041308(R) 2011 Phys. Rev. B 84 075466 2011 Chin. Phys. Lett. 28 088502 2006 Phys. Lett. A 356 376 2006 Phys. Rev. B 74 073305 2006 Phys. Rev. B 73 155325 2008 Chin. Phys. Lett. 25 3389 2008 Nano Lett. 8 2556 Am. Sci. 3 2672010 Phys. Rev. Lett. 104 256804 1998 Phys. Rev. Lett. 80 4165 1999 Phys. Rev. B 59 5915 2001 Phys. Rev. Lett. 87 116603 Acta Phys. Slovaca 56 6512007 Phys. Rev. E 75 031113 2011 Phys. Rev. B 83 245328 2010 Europhys. Lett. 90 47004 1986 Phys. Rev. Lett. 57 1761 2001 Phys. Rev. B 63 165424 2000 Phys. Rev. B 62 R4790 1993 Phys. Rev. B 47 6555 1994 Phys. Rev. B 50 11008 1991 Phys. Rev. B 44 12837
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[2]
.
[3]
.
[4]
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[5]
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[6]
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[7]
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[8]
Samad Javidan*
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2012, Vol. 29 
