Please wait a minute...
Chin. Phys. B, 2013, Vol. 22(5): 058504    DOI: 10.1088/1674-1056/22/5/058504
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

The effect of dimerization on the magnetoresistance in organic spin valves

Wang Hui (王辉), Hu Gui-Chao (胡贵超), Ren Jun-Feng (任俊峰)
College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
Abstract  The effect of lattice dimerization on the magnetoresistance (MR) in organic spin valves is investigated based on the Su-Schrieffer-Heeger (SSH) model and the Green's function method. By comparing with the results for a uniform chain, we find that the dimerization of the molecular chain modifies the monotonic dependence of the MR on the bias to an oscillatory one. A sign inversion of the MR is observed when the amplitude of the dimerization is adjusted. The results also show that at a low bias, the MR through a dimerized chain decreases with the increasing bias as well as the increasing chain length, which is consistent with the experimental reports. A further understanding can be achieved by analyzing the electronic states and the spin-dependent transmission spectrum with the parallel and antiparallel magnetization orientations of the two ferromagnetic electrodes.
Keywords:  organic spintronics      magnetoresistance      dimerization  
Received:  06 November 2012      Revised:  09 December 2012      Accepted manuscript online: 
PACS:  85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)  
  73.61.Ph (Polymers; organic compounds)  
  75.47.-m (Magnetotransport phenomena; materials for magnetotransport)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10904084 and 10904083) and the Shandong Province Middle-Aged and Young Scientists Research Awards Foundation, China (Grant No. 2009BS01009).
Corresponding Authors:  Hu Gui-Chao     E-mail:  hgc@sdnu.edu.cn

Cite this article: 

Wang Hui (王辉), Hu Gui-Chao (胡贵超), Ren Jun-Feng (任俊峰) The effect of dimerization on the magnetoresistance in organic spin valves 2013 Chin. Phys. B 22 058504

[1] Baibich M N, Broto J M, Fert A, Nguyen Van Dau F, Petroff F, Etienne P, Creuzet G, Friedrich A and Chazelas J 1988 Phys. Rev. Lett. 61 2472
[2] Jedema F J, Filip A T and van Wees B J 2001 Nature 410 345
[3] Gardelis S, Smith C G, Barnes C H W, Linfield E H and Ritchie D A 1999 Phys. Rev. B 60 7764
[4] Moodera J S and Kinder L R 1996 J. Appl. Phys. 79 4724
[5] Li F Y, Jin C Q, Meng F B, Li Y X, Wang H, Zhao H W, Wang C S, Wang Y J and Zhan W S 2002 Chin. Phys. B 11 178
[6] Pramanik S, Stefanita C G, Patibandla S, Bandyopadhyay S, Garre K, Harth N and Cahay M 2007 Nat. Nanotechnol. 2 216
[7] Ren J F and Xiu M X 2008 Chin. Phys. Lett. 25 2618
[8] Yuan X B, Ren J F and Hu G C 2012 Chin. Phys. Lett. 29 067501
[9] Dediu V, Murgia M, Matacotta F C, Taliani C and Barbanera S 2002 Solid State Commun. 122 181
[10] Xiong Z H, Wu D, Vardeny Z V and Shi J 2004 Nature 427 821
[11] Santos T S, Lee J S, Migdal P, Lekshmi I C, Satpati B and Moodera J S 2007 Phys. Rev. Lett. 98 016601
[12] Sun D L, Yin L F, Sun C J, Guo H W, Gai Z, Zhang X G, Ward T Z, Cheng Z H and Shen J 2010 Phys. Rev. Lett. 104 236602
[13] Zhan Y Q, Bergenti I, Hueso L E and Dediu V 2007 Phys. Rev. B 76 045406
[14] Waldron D, Haney P, Larade B, MacDonald A and Guo H 2006 Phys. Rev. Lett. 96 166804
[15] Senapati L, Pati R and Erwin S C 2007 Phys. Rev. B 76 024438
[16] Mandal S and Pati R 2012 ACS Nano 6 3580
[17] Julliere M 1975 Phys. Lett. 54 225
[18] Su W P, Schrieffer J R and Heeger A J 1979 Phys. Rev. Lett. 42 1698
[19] Mujica V, Roitberg A E and Ratner M 2000 J. Chem. Phys. 112 6834
[20] Datta S 1995 Electronic Transport in Mesoscopic Systems (New York: Oxford University Press) p. 148
[21] Papaconstantopoulos D A 1986 Handbook of the Band Structure of Elemental Solids (New York: Plenum Press) p. 103
[22] Schoonus J J H M, Lumens P G E, Wagemans W, Kohlhepp J T, Bobbert P A, Swagten H J M and Koopmans B 2009 Phys. Rev. Lett. 103 146601
[23] Peierls R 1955 Quantum Theory of Solids (Oxford: Oxford University Press) p. 108
[24] Vinzelberg H, Schumann J, Elefant D, Gangineni R B, Thomas J and Büchner B 2008 J. Appl. Phys. 103 093720
[25] Engelkes V B, Beebe J M and Frisbie C D 2004 J. Am. Chem. Soc. 126 14287
[1] Recent progress on the planar Hall effect in quantum materials
Jingyuan Zhong(钟景元), Jincheng Zhuang(庄金呈), and Yi Du(杜轶). Chin. Phys. B, 2023, 32(4): 047203.
[2] Abnormal magnetoresistance effect in the Nb/Si superconductor-semiconductor heterojunction
Zhi-Wei Hu(胡志伟) and Xiang-Gang Qiu(邱祥冈). Chin. Phys. B, 2023, 32(3): 037401.
[3] Measurement of T wave in magnetocardiography using tunnel magnetoresistance sensor
Zhihong Lu(陆知宏), Shuai Ji(纪帅), and Jianzhong Yang(杨建中). Chin. Phys. B, 2023, 32(2): 020703.
[4] Strain-mediated magnetoelectric control of tunneling magnetoresistance in magnetic tunneling junction/ferroelectric hybrid structures
Wenyu Huang(黄文宇), Cangmin Wang(王藏敏), Yichao Liu(刘艺超), Shaoting Wang(王绍庭), Weifeng Ge(葛威锋), Huaili Qiu(仇怀利), Yuanjun Yang(杨远俊), Ting Zhang(张霆), Hui Zhang(张汇), and Chen Gao(高琛). Chin. Phys. B, 2022, 31(9): 097502.
[5] Analytical formula describing the non-saturating linear magnetoresistance in inhomogeneous conductors
Shan-Shan Chen(陈珊珊), Yang Yang(杨阳), and Fan Yang(杨帆). Chin. Phys. B, 2022, 31(8): 087303.
[6] Spin transport in epitaxial Fe3O4/GaAs lateral structured devices
Zhaocong Huang(黄兆聪), Wenqing Liu(刘文卿), Jian Liang(梁健), Qingjie Guo(郭庆杰), Ya Zhai(翟亚), and Yongbing Xu(徐永兵). Chin. Phys. B, 2022, 31(6): 068505.
[7] Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs
Wen-Chong Li(李文充), Ling-Xiao Zhao(赵凌霄), Hai-Jun Zhao(赵海军),Gen-Fu Chen(陈根富), and Zhi-Xiang Shi(施智祥). Chin. Phys. B, 2022, 31(5): 057103.
[8] Magnetoresistance effect in vertical NiFe/graphene/NiFe junctions
Pei-Sen Li(李裴森), Jun-Ping Peng(彭俊平), Yue-Guo Hu(胡悦国), Yan-Rui Guo(郭颜瑞), Wei-Cheng Qiu(邱伟成), Rui-Nan Wu(吴瑞楠), Meng-Chun Pan(潘孟春), Jia-Fei Hu(胡佳飞), Di-Xiang Chen(陈棣湘), and Qi Zhang(张琦). Chin. Phys. B, 2022, 31(3): 038502.
[9] Large positive magnetoresistance in photocarrier-doped potassium tantalites
Rui-Shu Yang(杨睿姝), Ding-Bang Wang(王定邦), Yang Zhao(赵阳), Shuan-Hu Wang(王拴虎), and Ke-Xin Jin(金克新). Chin. Phys. B, 2022, 31(12): 127302.
[10] Observation of quadratic magnetoresistance in twisted double bilayer graphene
Yanbang Chu(褚衍邦), Le Liu(刘乐), Yiru Ji(季怡汝), Jinpeng Tian(田金朋), Fanfan Wu(吴帆帆), Jian Tang(汤建), Yalong Yuan(袁亚龙), Yanchong Zhao(赵岩翀), Xiaozhou Zan(昝晓州), Rong Yang(杨蓉), Kenji Watanabe, Takashi Taniguchi, Dongxia Shi(时东霞), Wei Yang(杨威), and Guangyu Zhang(张广宇). Chin. Phys. B, 2022, 31(10): 107201.
[11] Sign reversal of anisotropic magnetoresistance and anomalous thickness-dependent resistivity in Sr2CrWO6/SrTiO3 films
Chunli Yao(姚春丽), Tingna Shao(邵婷娜), Mingrui Liu(刘明睿), Zitao Zhang(张子涛), Weimin Jiang(姜伟民), Qiang Zhao(赵强), Yujie Qiao(乔宇杰), Meihui Chen(陈美慧), Xingyu Chen(陈星宇), Ruifen Dou(窦瑞芬), Changmin Xiong(熊昌民), and Jiacai Nie(聂家财). Chin. Phys. B, 2022, 31(10): 107302.
[12] Probing the magnetization switching with in-plane magnetic anisotropy through field-modified magnetoresistance measurement
Runrun Hao(郝润润), Kun Zhang(张昆), Yinggang Li(李迎港), Qiang Cao(曹强), Xueying Zhang(张学莹), Dapeng Zhu(朱大鹏), and Weisheng Zhao(赵巍胜). Chin. Phys. B, 2022, 31(1): 017502.
[13] High-resolution angle-resolved photoemission study of large magnetoresistance topological semimetal CaAl4
Xu-Chuan Wu(吴徐传), Shen Xu(徐升), Jian-Feng Zhang(张建丰), Huan Ma(马欢), Kai Liu(刘凯), Tian-Long Xia(夏天龙), and Shan-Cai Wang(王善才). Chin. Phys. B, 2021, 30(9): 097303.
[14] Negative tunnel magnetoresistance in a quantum dot induced by interplay of a Majorana fermion and thermal-driven ferromagnetic leads
Peng-Bin Niu(牛鹏斌), Bo-Xiang Cui(崔博翔), and Hong-Gang Luo(罗洪刚). Chin. Phys. B, 2021, 30(9): 097401.
[15] Current-dependent positive magnetoresistance inLa0.8Ba0.2MnO3 ultrathin films
Guankai Lin(林冠凯), Haoru Wang(王昊儒), Xuhui Cai(蔡旭晖), Wei Tong(童伟), and Hong Zhu(朱弘). Chin. Phys. B, 2021, 30(9): 097502.
No Suggested Reading articles found!