Switching, Dual Spin-Filtering Effects, and Negative Differential Resistance in a Carbon-Based Molecular Device

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	Switching, Dual Spin-Filtering Effects, and Negative Differential Resistance in a Carbon-Based Molecular Device
	H. Q. Wan; B. H. Zhou; X. W. Chen; C. Q. Sun; G. H. Zhou
	2012
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	116 期号:3 页码:2570-2574
摘要	We present ab initio calculations for spin-dependent electron transport in a molecular device constructed by two carbon chains capped with a phenyl ring, which is sandwiched between two zig-zag-edged graphene nanoribbon (ZGNR) electrodes, where the ZGNRs are modulated by external magnetic field. The coexistence of switching, dual spin-filtering effects, and negative differential resistance (NDR) in the model device is demonstrated with the theory of carbon pi-electrons. Interestingly, a two-state molecular conformational switch can be realized by changing the orientation between the planes of phenyl ring and electrodes, where the majority-spin current modulation (ON/OFF ratio) is 170-479 within the considered bias window. Moreover, the device shows perfect dual spin-filtering effect and can generate and control a full dual spin-polarized current through either the source-drain voltage or magnetic configuration of the electrodes. The selective spin current is due to a dual selection rule, the symmetry match between two ZGNR electrodes spin channel, and the carbon chain's spin selection in our system. In addition, the obvious NDR behavior has also been observed in our model.
部门归属	[wan, haiqing; zhou, benhu; chen, xiongwen; zhou, guanghui] hunan normal univ, dept phys, changsha 410081, hunan, peoples r china. [wan, haiqing; zhou, benhu; chen, xiongwen; zhou, guanghui] hunan normal univ, minist educ, key lab low dimens quantum struct & manipulat, changsha 410081, hunan, peoples r china. [wan, haiqing] nanchang teachers coll, dept sci, nanchang 330029, peoples r china. [sun, chang q.] nanyang technol univ, sch elect & elect engn, singapore 639798, singapore. [zhou, guanghui] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;zhou, gh (reprint author), hunan normal univ, dept phys, changsha 410081, hunan, peoples r china.;ghzhou@hunnu.edu.cn
关键词	Transport Graphene Chains Conductance Prediction Wires
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60271
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Q. Wan,B. H. Zhou,X. W. Chen,et al. Switching, Dual Spin-Filtering Effects, and Negative Differential Resistance in a Carbon-Based Molecular Device[J]. Journal of Physical Chemistry C,2012,116(3):2570-2574.
APA	H. Q. Wan,B. H. Zhou,X. W. Chen,C. Q. Sun,&G. H. Zhou.(2012).Switching, Dual Spin-Filtering Effects, and Negative Differential Resistance in a Carbon-Based Molecular Device.Journal of Physical Chemistry C,116(3),2570-2574.
MLA	H. Q. Wan,et al."Switching, Dual Spin-Filtering Effects, and Negative Differential Resistance in a Carbon-Based Molecular Device".Journal of Physical Chemistry C 116.3(2012):2570-2574.