中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Contact effects in spin transport along double-helical molecules

文献类型:期刊论文

作者Guo, AM ; Diaz, E ; Gaul, C ; Gutierrez, R ; Dominguez-Adame, F ; Cuniberti, G ; Sun, QF
刊名PHYSICAL REVIEW B
出版日期2014
卷号89期号:20
ISSN号1098-0121
通讯作者Guo, AM (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要We report on spin transport along double-helical molecular systems by considering various contact configurations and asymmetries between the two helical strands in the regime of completely coherent charge transport. Our results reveal that no spin polarization appears in two-terminal molecular devices when coupled to one-dimensional electrodes. The same holds in the case of finite-width electrodes if there is a bottleneck of one single site in the system electrode-molecule-electrode. Then, additional dephasing is necessary to induce spin-filtering effects. In contrast, nonzero spin polarization is found in molecular devices with multiple terminals or with two finite-width electrodes, each of them connected to more than one site of the molecule. The magnitude of spin polarization can be enhanced by increasing the asymmetry between the two strands. We point out that the spin-filtering effects could emerge in double-helical molecular devices at low temperature without dephasing by a proper choice of the electrode number and the connection between the molecule and the electrodes.
资助信息DAAD [54367888]; NBRP of China [2012CB921303]; MINECO [PRI-AIBDE-2011-0.927, MAT 2010-17180]; NSF-China [11274364]; PDSF-China [2013M540153]; German Excellence Initiative: Cluster of Excellence "Center for Advancing Electronics Dresden" (cfAED) [EXC 1056]
语种英语
公开日期2015-04-14
源URL[http://ir.iphy.ac.cn/handle/311004/59539]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Guo, AM,Diaz, E,Gaul, C,et al. Contact effects in spin transport along double-helical molecules[J]. PHYSICAL REVIEW B,2014,89(20).
APA Guo, AM.,Diaz, E.,Gaul, C.,Gutierrez, R.,Dominguez-Adame, F.,...&Sun, QF.(2014).Contact effects in spin transport along double-helical molecules.PHYSICAL REVIEW B,89(20).
MLA Guo, AM,et al."Contact effects in spin transport along double-helical molecules".PHYSICAL REVIEW B 89.20(2014).

入库方式: OAI收割

来源:物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。