胺连接的烷基链的电导
Tunneling conductance of amine linked alkyl chains
摘要：
将在Phys. Rev. B { \bf 76}，115102（2007）中开发的隧穿传输理论应用于由经由胺基连接到金电极的烷基链制成的分子器件。使用我们以前的工作中推导出的隧道电导的解析表达式，我们确定的关键物理量，表征这些设备的电导。通过研究三个器件的输运特性，包含4，6，和8个甲基，我们提取的隧道电导链的长度，这是一个指数衰减规律与最近的实验数据密切一致的依赖。
英文摘要：
The tunneling transport theory developed in Phys. Rev. B {\bf 76}, 115102 (2007) is applied to molecular devices made of alkyl chains linked to gold electrodes via amine groups. Using the analytic expression of the tunneling conductance derived in our previous work, we identify the key physical quantities that characterize the conductance of these devices. By investigating the transport characteristics of three devices, containing 4, 6, and 8 methyl groups, we extract the dependence of the tunneling conductance on the chain's length, which is an exponential decay law in close agreement with recent experimental data.
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