Spin Filtering in a Rashba Electron Waveguide Induced by Edge Disorder

  • Received Date: March 06, 2012
  • Published Date: July 31, 2012
  • 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.
  • Article Text

  • [1] Datta S and Sarma S Das 1990 Appl. Phys. Lett. 56 665 doi: 10.1063/1.102730
    [2] Rashba E I 1960 Sov. Phys. Solid State 2 1109
    [3] Bychkov Y A and Rashba E I 1984 J. Phys. C 17 6039
    [4] Grundler D 2000 Phys. Rev. Lett. 84 6074
    [5] Koga T, Nitta J, Akazaki T and Takayanagi H 2002 Phys. Rev. Lett. 89 046801
    [6] Sherman E Y 2003 Phys. Rev. B 67 161303(R)
    [7] Golub L E and Ivchenko E L 2004 Phys. Rev. B 69 115333
    [8] Yamamoto M, Ohtsuki T and Kramer B 2005 Phys. Rev. B 72 115321
    [9] Zhai F and Xu H Q 2007 Phys. Rev. B 76 035306
    [10] Bellucci S and Onorato P 2008 Phys. Rev. B 77 075303
    [11] Yamamoto M and Kramer B 2008 J. Appl. Phys. 103 123703
    [12] Yokoyama T and Eto M 2009 Phys. Rev. B 80 125311
    [13] Ohe J, Yamamoto M, Ohtsuki T and Nitta J 2005 Phys. Rev. B 72 041308(R)
    [14] Sun Q F and Xie X C 2005 Phys. Rev. B 71 155321
    [15] Zhang Z Y 2007 J. Phys: Condens. Matter 19 016209
    [16] Liu G H and Zhou G H 2007 J. Appl. Phys. 101 063704
    [17] Japaridze G I, Johannesson H and Ferraz A 2009 Phys. Rev. B 80 041308(R)
    [18] Malard M, Grusha I, Japaridze G I and Johannesson H 2011 Phys. Rev. B 84 075466
    [19] Javidan S 2011 Chin. Phys. Lett. 28 088502
    [20] Wang H X, Xiong S J and Evangelou S N 2006 Phys. Lett. A 356 376
    [21] Pǎlyi A, Pěterfalvi C and Cserti J 2006 Phys. Rev. B 74 073305
    [22] F?ldi P, Kǎlmǎn O, Benedict M G and Peeters F M 2006 Phys. Rev. B 73 155325
    [23] Fang M and Sun L L 2008 Chin. Phys. Lett. 25 3389
    [24] F?ldi P, K?lm?n O, Benedict M G and Peeters F M 2008 Nano Lett. 8 2556
    [25] Saminadayar L, B?uerle C and Mailly D 2004 Am. Sci. 3 267
    [26] Str?m A, Johannesson H and Japaridze G I 2010 Phys. Rev. Lett. 104 256804
    [27] García-Martín A, Torres J A, Sǎenz J J and Nieto-Vesperinas M 1998 Phys. Rev. Lett. 80 4165
    [28] Sǎnchez-Gil J A, Freiliker V, Maradudin A A and Yurkevich I V 1999 Phys. Rev. B 59 5915
    [29] García-Martín A and Sǎenz J J 2001 Phys. Rev. Lett. 87 116603
    [30] Marko? 2006 Acta Phys. Slovaca 56 651
    [31] Froufe-Pěrez L S, Yěpez M, Melo P M and Sǎenz J J 2007 Phys. Rev. E 75 031113
    [32] Feilhauer J and Mo?ko M 2011 Phys. Rev. B 83 245328
    [33] Xiao X B and Chen Y G 2010 Europhys. Lett. 90 47004
    [34] Büttiker M 1986 Phys. Rev. Lett. 57 1761
    [35] Pareek T P and Bruno P 2001 Phys. Rev. B 63 165424
    Schmidt G, Ferrand D, Molenkamp L W, Filip A T and Wees van B J 2000 Phys. Rev. B 62 R4790
    [36] Nikoli? K and MacKinnon A 1993 Phys. Rev. B 47 6555
    [37] Nikoli? K and MacKinnon A 1994 Phys. Rev. B 50 11008
    [38] Bryant G W 1991 Phys. Rev. B 44 12837
  • Related Articles

    [1]DUAN Kai-Liang, LI Jian-Feng, ZHAO Wei, WANG Yi-Shan. Propagation of Single-Mode Fibre Laser Beams through an Optical ABCD System with Circular Aperture at the Fibre Output End [J]. Chin. Phys. Lett., 2008, 25(4): 1287-1290.
    [2]ZHANG Li, CAO Li. Dynamical Properties of a Single-Mode Laser Driven by Quadratic Pump Noise [J]. Chin. Phys. Lett., 2007, 24(2): 436-439.
    [3]ZHU Ping, CHEN Shi-Bo, MEI Dong-Cheng. Intensity Correlation Function and Associated Relaxation Time of a Saturation Laser Model with Correlated Noises [J]. Chin. Phys. Lett., 2006, 23(1): 29-31.
    [4]CHEN Li-Mei, CAO Li, WU Da-Jin. Intensity Correlation Time of a Single-Mode Laser Driven by Two Coloured Noises with Coloured Cross-Correlation with Bias Signal Modulation [J]. Chin. Phys. Lett., 2005, 22(10): 2500-2503.
    [5]WANG Jun, CAO Li, WU Da-Jin. Influences of Modulated Noise on Normalized Intensity Fluctuation in a Single-Mode Laser [J]. Chin. Phys. Lett., 2004, 21(2): 246-249.
    [6]XIE Chong-Wei, MEI Dong-Cheng. Effects of Correlations Between the Real and Imaginary Partsof Quantum Noise on Intensity Fluctuation for a Single-Mode Laser [J]. Chin. Phys. Lett., 2003, 20(10): 1681-1684.
    [7]MEI Dong-cheng, XIE Guang-zhong, CAO Li, WU Da-jin. Transient Properties of a Bistable System Driven by Cross-Correlated Noises: Correlation Times are Nonzero Case [J]. Chin. Phys. Lett., 1999, 16(5): 327-329.
    [8]WANG Zhong-long, CAO L, QIU Jun-lin. Correlation Function and Time-Dependent Moments of the Intensity for Gain-Noise Model of a Single-Mode Laser with Exponential Function Correlation Noise [J]. Chin. Phys. Lett., 1998, 15(7): 498-500.
    [9]LONG Quan, CAO Li, WU Da-jin, LI Zai-guang. Effects of a Novel Drift Term Due to Cross Correlation Between Additive and Multiplicative Noises in a Single-Mode Laser [J]. Chin. Phys. Lett., 1998, 15(4): 266-268.
    [10]WEI Xue-qin, CAO Li, WU Da-jin. Effects of Correlated Noises on Statistic Property of Single-Mode Laser [J]. Chin. Phys. Lett., 1996, 13(8): 583-586.

Catalog

    Article views (0) PDF downloads (447) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return