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
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