散粒噪声测量中观测到的传导通道的分子起源。

Molecular origins of conduction channels observed in shot-noise measurements.

作者信息

Solomon Gemma C, Gagliardi Alessio, Pecchia Alessandro, Frauenheim Thomas, Di Carlo Aldo, Reimers Jeffrey R, Hush Noel S

机构信息

School of Chemistry, The University of Sydney, NSW 2006, Australia.

出版信息

Nano Lett. 2006 Nov;6(11):2431-7. doi: 10.1021/nl0614516.

DOI:10.1021/nl0614516

PMID:17090069

Abstract

Measurements of shot noise from single molecules have indicated the presence of various conduction channels. We present three descriptions of these channels in molecular terms showing that the number of conduction channels is limited by bottlenecks in the molecule and that the channels can be linked to transmission through different junction states. We introduce molecular-conductance orbitals, which allow the transmission to be separated into contributions from individual orbitals and contributions from interference between pairs of orbitals.

摘要

对单分子散粒噪声的测量表明存在各种传导通道。我们从分子角度给出了对这些通道的三种描述，表明传导通道的数量受分子中瓶颈的限制，并且这些通道可以与通过不同结态的传输相关联。我们引入了分子电导轨道，它可以将传输分离为来自单个轨道的贡献以及来自轨道对之间干涉的贡献。