Disentangling the Complex Electronic Structure of an Adsorbed Nanographene: Cycloarene C108
arxiv(2021)
摘要
We combine low-temperature scanning tunneling spectroscopy, CO functionalized
tips and algorithmic data analysis to investigate the electronic structure of
the molecular cycloarene C108 (graphene nanoring) adsorbed on a Au(111)
surface. We demonstrate that CO functionalized tips enhance the visibility of
molecular resonances, both in differential conductance spectra and in
real-space topographic images without introducing spurious artifacts. Comparing
our experimental data with ab-initio density functional theory reveals a
remarkably precise agreement of the molecular orbitals and enables us to
disentangle close-lying molecular states only separated by 50 meV at an energy
of 2 eV below the Fermi level. We propose this combination of techniques as a
promising new route for a precise characterization of complex molecules and
other physical entities which have electronic resonances in the tip-sample
junction.
更多查看译文
关键词
adsorbed nanographene,complex electronic structure,electronic structure,cycloarene c108
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要