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According to the permeation phenomenon of magnetic atoms in organic device, such as Co/organic semiconductor (OSC)/La0.7Sr0.3MnO3, the evolution of spin polarons and spinless bipolarons are calculated with the drift-diffusion equations to investigate the effect of polaron-bipolaron interaction on spin polarized transport in a magnetic permeated sublayer (MPS). It is found that the MPS has different spin-flip time and mobility from those in pure organic semiconductor. The splitting of spin-flip time will be adjusted by the effect of the magnetization of the impurity atoms. Mobilities of spin carriers in the MPS will be reduced due to the scattering of the Co atoms. Both the spin-flip time and the mobility will affect the polaron-bipolaron interaction and further influence the spin polarized transport. It is found that the splitting of spin-flip time is the main factor responsible for the spin relaxation, while the polaron-bipolaron interaction is the secondary factor.
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Keywords:
- organic spintronics /
- magnetic permeated sublayer /
- bipolarons /
- spin polarization
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[1] Baibich M N, Broto J M, Fert A, Nguyen F D V, Petroff F, Etienne P, Creuzet G, Friederich A, Chazelas J 1988 Phys. Rev. Lett. 61 2472
[2] Wolf S A, Awschalom D D, Buhrman R A, Daughton J M, Molnár S V, Roukes M L, Chtchelkanova A Y, Treger D M 2001 Science 294 1488
[3] Žutić I, Fabian J, Sarma S D 2004 Rev. Mod. Phys. 76 323
[4] Dou Z T, Ren J F, Wang Y M, Yuan X B, Hu G C 2012 Acta Phys. Sin. 61 088503 (in Chinese) [窦兆涛, 任俊峰, 王玉梅, 原晓波, 胡贵超 2012 61 088503]
[5] Koopmans B 2014 Nature Phys. 10 249
[6] Li W F, Liang Y X, Jin Y, Wei J H 2010 Acta Phys. Sin. 59 8850 (in Chinese) [李维峰, 梁迎新, 金勇, 魏建华 2010 59 8850]
[7] Sanvito S 2011 Chem. Soc. Rev. 40 3336
[8] Zhang X, Mizukami S, Kubota T, Ma Q, Oogane M, Naganuma H, Ando Y, Miyazaki T 2013 Nature Commun. 4 1392
[9] Heeger A J, Kivelson S, Schrieffer J R, Su W P 1988 Rev. Mod. Phys. 60 781
[10] Xie S J, Ahn K H, Smith D L, Bishop A R, Saxena A 2003 Phys. Rev. B 67 125202
[11] Fu J Y, Ren J F, Liu X J, Liu D S, Xie S J
[12] Scott J C, Pfluger P, Krounbi M T, Street G B 1983 Phys. Rev. B 28 2140
[13] Genoud F, Guglielmi M, Nechtschein M, Genies E, Salmon M 1985 Phys. Rev. Lett. 55 118
[14] Dediu V, Murgia M, Matacotta F C, Taliani C, Barbanera S 2002 Solid State Commun. 122 181
[15] Ozbay A, Nowak E R, Yu Z G, Chu W, Shi Y, Krishnamurthy S, Tang Z, Newman N 2009 Appl. Phys. Lett. 95 232507
[16] Yu Z G, Berding M A, Krishnamurthy S 2005 Phys. Rev. B 71 060408R
[17] Gao K, Xie S J, Li Y, Yin S, Liu D S, Zhao X 2009 Chin. Phys. B 18 2961
[18] Smith D L, Silver R N 2001 Phys. Rev. B 64 045323
[19] Ren J F, Fu J Y, Liu D S, Mei L M, Xie S J 2005 J. Appl. Phys. 98 074503
[20] Ren J F, Fu J Y, Liu D S, Mei L M, Xie S J 2005 J. Phys.: Condens. Matter 17 2341
[21] Ren J F, Zhang Y B, Xie S J 2007 Acta Phys. Sin. 56 4785 (in Chinese) [任俊峰, 张玉滨, 解士杰 2007 56 4785]
[22] Harmon N J, Flatté M E 2012 Phys. Rev. Lett. 108 186602
[23] Lee S T, Gao Z Q, Hung L S 1999 Appl. Phys. Lett. 75 1404
[24] Zhao J Q, Xie S J, Han S H, Yang Z W, Ye L N, Yang T L 2000 Synth. Met. 114 251
[25] Xiong Z H, Wu D, Vardeny Z V, Shi J 2004 Nature 427 821
[26] Wang F J, Yang C G, Vardeny Z V, Li X G 2007 Phys. Rev. B 75 245324
[27] Pramanik S, Stefanita C G, Patibandla S, Bandyopadhyay S, Garre K, Harth N, Cahay M 2007 Nature Nanotech. 2 216
[28] Zhang Y B, Ren J F, Lei J, Xie S J 2009 Org. Electron. 10 568
[29] Zhang Y B, Ren J F, Hu G C, Xie S J 2008 Org. Electron. 9 687
[30] Pershin Y V, Privman V 2003 Phys. Rev. Lett. 90 256602
[31] Yu Z G, Flatté M E 2002 Phys. Rev. B 66 235302
[32] Prince M B 1953 Phys. Rev. 92 681
[33] Cinchetti M, Heimer K, Wüstenberg J P, Andreyev O, Bauer M, Lach S, Ziegler C, Gao Y, Aeschlimann M 2009 Nature Mater. 8 115
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