论文标题
在表面上产生的十二烯：能量差距的重新开放
Dodecacene Generated on Surface: Re-opening of the Energy Gap
论文作者
论文摘要
乙烯系列代表了一个独特的模型系统，可在一维限制中研究扩展PI电子结构的有趣电子性能，这对于电子和旋转型的应用以及对电子传输的基本了解至关重要。在这里，我们介绍到目前为止获得的最长苯的地面生成：十二烯。扫描隧道光谱范围可访问其电子状态在AU（111）表面上的能量位置和空间分布。我们观察到，在脱乙烯和未赛期的长度上逐渐缩小间隙并稳定至约1 eV之后，十二烯的能量差距意外地增加到1.4 eV。考虑到呈阳离子序列是一种示例性的一般情况，我们与电离能，电子亲和力和光学间隙相比，与单个隧道共振的长度讨论了演变。
The acene series represents a unique model system to investigate the intriguing electronic properties of extended pi electron structures in the one-dimensional limit, which are important for applications in electronics and spintronics and for the fundamental understanding of electronic transport. Here we present the on-surface generation of the longest acene obtained so far: Dodecacene. Scanning tunneling spectroscopy gives access to the energy position and spatial distribution of its electronic states on the Au(111) surface. We observe that, after a progressive closing of the gap and a stabilization to about 1 eV at the length of decacene and undecacene, the energy gap of dodecacene unexpectedly increases to 1.4 eV. Considering the acene series as an exemplary general case, we discuss the evolution with length of the single tunneling resonances in comparison with ionization energy, electronic affinity, and optical gap.
