Quantum-Interference-Controlled Molecular Electronics

被引：220

作者：

Ke, San-Huang ^{[1
]}

Yang, Weitao ^{[1
]}

Baranger, Harold U. ^{[2
]}

机构：

[1] Duke Univ, Dept Chem, Durham, NC 27708 USA

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 10期

关键词：

D O I：

10.1021/nl8016175

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Quantum interference in coherent transport through single molecular rings may provide a mechanism to control the current in molecular electronics. We investigate its applicability, using a single-particle Green function method combined with ab initio electronic structure calculations. We find that the quantum interference effect (QIE) is strongly dependent on the interaction between molecular pi-states and contact sigma-states. It is masked by sigma tunneling in small molecular rings with Au leads, such as benzene, due to strong pi-sigma hybridization, while it is preserved in large rings, such as [18]annulene, which then could be used to realize quantum interference effect (QIE) transistors.

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收藏

页码：3257 / 3261

页数：5

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