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arXiv 0912.0409cond-mat.mes-hallcond-mat.mtrl-sci
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通过单个苯分子的多端量子输运:分子晶体管的证据

Multi-terminal quantum transport through a single benzene molecule: Evidence of a Molecular Transistor

Santanu K. Maiti

摘要:

我们探讨了通过Aharonov-Bohm通量$ϕ$的苯分子的多终端量子输运。一个简单的紧束缚模型被用来描述系统和所有的计算都是基于格林函数形式主义。在简要介绍了双端量子输运的基础上,详细研究了苯分子的三端输运性质,揭示了电子输运的实际机理。本文从分子耦合强度和磁通量$ϕ$两个方面数值计算了多端电导、反射几率和电流-电压特性。最重要的是,我们观察到,苯分子连接到三个末端的分子系统可以作为晶体管工作,我们称之为分子晶体管。这一方面可以利用在纳米电子电路的设计和我们的研究可能提供一个基本的框架,研究任何复杂的多终端量子系统中的电子输运。

英文摘要:

We explore multi-terminal quantum transport through a benzene molecule threaded by an Aharonov-Bohm flux $ϕ$. A simple tight-binding model is used to describe the system and all the calculations are done based on the Green's function formalism. With a brief description of two-terminal quantum transport, we present a detailed study of three-terminal transport properties through the benzene molecule to reveal the actual mechanism of electron transport. Here we numerically compute the multi-terminal conductances, reflection probabilities and current-voltage characteristics in the aspects of molecular coupling strength and magnetic flux $ϕ$. Most significantly we observe that, the molecular system where the benzene molecule is attached to three terminals can be operated as a transistor, and we call it a molecular transistor. This aspect can be utilized in designing nano-electronic circuits and our investigation may provide a basic framework to study electron transport in any complicated multi-terminal quantum system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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