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Spin-polarized transport in magnetic pn junction has been theoretically studied by using the drift-diffusive theory. The factors considered include bias voltage, equilibrium spin polarization,spin injection and spin life time, which could effectively affect the current density and resistance. The connection between spin-voltaic effect of the magnetic pn junction and thickness of the junction was also discussed. It is found that the equilibrium spin polarization makes the spin electrons with different orientations (up or down) have different barriers, which makes the current effectively modulated. However, the spin injection modulates the current by providing non-equilibrium spin electrons in the magnetic pn junction. It is also found that the spin-voltaic current is sensitive to quasi-neutral p-type region width.
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Keywords:
- magnetic pn junction /
- spin-polarization /
- spin life time /
- spin-voltaic effect
[1] Ji Y, Luo H H, Ruan X Z, Wang W Z, Yang W, Zhao J H 2009 Acta Phys. Sin. 58 8560(in Chinese)[姬 扬、罗海辉、阮学忠、王玮竹、杨 威、赵建华 2009 物理学报 58 8560]
[2] Cheng X W, Gao Y L, Li X, Liu Y, Long X, Yu Z 2009 Acta Phys. Sin. 58 2018(in Chinese)[程兴旺、高院玲、李 祥、刘 颖、龙 雪、于 宙 2009 物理学报 58 2018]
[3] Li D F, Shi J R 2009 Chin. Phys. B 18 282
[4] Datta S, Das B 1990 Appl. Phys. Lett. 56 665
[5] Stc ˇ eda P, eba P 2003 Phys. Rev. Lett. 90 256601
[6] Ertler C, Fabian J 2007 Phys. Rev. B 75 195323
[7] Wang J, Liu Y, Mao H B 2009 Appl. Phys. Lett. 94 172501
[8] Flatté M E, Vignale G 2005 J. Appl. Phys. 97 104508
[9] Fabian J, utic ＇ I, Sarma S D 2002 Phys. Rev. B 66 165301
[10] Murayama A, Asahina T, Nishibayashi K 2006 Appl. Phys. Lett. 88 023114
[11] Tran M, Jaffrès H , Deranlot C 2009 Phys. Rev. Lett. 102 036601
[12] Grenet L, Jamet M, Noé P , Calvo V 2009 Appl. Phys. Lett. 94 032502
[13] utic ＇ I, Fabian J, Sarma S D 2002 Phys. Rev. Lett. 88 066603
[14] Zerrouati K, Fabre F, Bacquet G. 1988 Phys. Rev. B 37 1334
[15] Fabian J, Sarma S D 1999 J. Vac. Sci. Technol. B 17 1708
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[1] Ji Y, Luo H H, Ruan X Z, Wang W Z, Yang W, Zhao J H 2009 Acta Phys. Sin. 58 8560(in Chinese)[姬 扬、罗海辉、阮学忠、王玮竹、杨 威、赵建华 2009 物理学报 58 8560]
[2] Cheng X W, Gao Y L, Li X, Liu Y, Long X, Yu Z 2009 Acta Phys. Sin. 58 2018(in Chinese)[程兴旺、高院玲、李 祥、刘 颖、龙 雪、于 宙 2009 物理学报 58 2018]
[3] Li D F, Shi J R 2009 Chin. Phys. B 18 282
[4] Datta S, Das B 1990 Appl. Phys. Lett. 56 665
[5] Stc ˇ eda P, eba P 2003 Phys. Rev. Lett. 90 256601
[6] Ertler C, Fabian J 2007 Phys. Rev. B 75 195323
[7] Wang J, Liu Y, Mao H B 2009 Appl. Phys. Lett. 94 172501
[8] Flatté M E, Vignale G 2005 J. Appl. Phys. 97 104508
[9] Fabian J, utic ＇ I, Sarma S D 2002 Phys. Rev. B 66 165301
[10] Murayama A, Asahina T, Nishibayashi K 2006 Appl. Phys. Lett. 88 023114
[11] Tran M, Jaffrès H , Deranlot C 2009 Phys. Rev. Lett. 102 036601
[12] Grenet L, Jamet M, Noé P , Calvo V 2009 Appl. Phys. Lett. 94 032502
[13] utic ＇ I, Fabian J, Sarma S D 2002 Phys. Rev. Lett. 88 066603
[14] Zerrouati K, Fabre F, Bacquet G. 1988 Phys. Rev. B 37 1334
[15] Fabian J, Sarma S D 1999 J. Vac. Sci. Technol. B 17 1708
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