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Nearly Perfect Spin Filter, Spin Valve and Negative Differential Resistance Effects in a Fe-4-based Single-molecule Junction
F. X. Zu; Z. L. Liu; K. L. Yao; G. Y. Gao; H. H. Fu; S. C. Zhu; Y. Ni; L. Peng
2014
Source PublicationScientific Reports
ISSN2045-2322
Volume4
AbstractThe spin-polarized transport in a single-molecule magnet Fe-4 sandwiched between two gold electrodes is studied, using nonequilibrium Green's functions in combination with the density-functional theory. We predict that the device possesses spin filter effect (SFE), spin valve effect (SVE), and negative differential resistance (NDR) behavior. Moreover, we also find that the appropriate chemical ligand, coupling the single molecule to leads, is a key factor for manipulating spin-dependent transport. The device containing the methyl ligand behaves as a nearly perfect spin filter with efficiency approaching 100%, and the transport is dominated by transmission through the Fe-4 metal center. However, in the case of phenyl ligand, the spin filter effect seems to be reduced, but the spin valve effect is significantly enhanced with a large magnetoresistance ratio, reaching 1800%. This may be attributed to the blocking effect of the phenyl ligands in mediating transport. Our findings suggest that such a multifunctional molecular device, possessing SVE, NDR and high SFE simultaneously, would be an excellent candidate for spintronics of molecular devices.
description.department[zu, fengxia ; liu, zuli ; yao, kailun ; gao, guoying ; fu, huahua ; zhu, sicong ; ni, yun ; peng, li] huazhong univ sci & technol, sch phys, wuhan 430074, peoples r china. [zu, fengxia ; liu, zuli ; yao, kailun ; gao, guoying ; fu, huahua ; zhu, sicong ; ni, yun ; peng, li] huazhong univ sci & technol, wuhan natl high magnet field ctr, wuhan 430074, peoples r china. [zu, fengxia] wuhan inst technol, sch sci, wuhan 430073, peoples r china. [yao, kailun] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. ; yao, kl (reprint author), huazhong univ sci & technol, sch phys, wuhan 430074, peoples r china. ; klyao@hust.edu.cn
KeywordSpintronics Anisotropy Magnets Gold
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72986
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
F. X. Zu,Z. L. Liu,K. L. Yao,et al. Nearly Perfect Spin Filter, Spin Valve and Negative Differential Resistance Effects in a Fe-4-based Single-molecule Junction[J]. Scientific Reports,2014,4.
APA F. X. Zu.,Z. L. Liu.,K. L. Yao.,G. Y. Gao.,H. H. Fu.,...&L. Peng.(2014).Nearly Perfect Spin Filter, Spin Valve and Negative Differential Resistance Effects in a Fe-4-based Single-molecule Junction.Scientific Reports,4.
MLA F. X. Zu,et al."Nearly Perfect Spin Filter, Spin Valve and Negative Differential Resistance Effects in a Fe-4-based Single-molecule Junction".Scientific Reports 4(2014).
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