Microscopic structure of k-doped organic monolayers

Abstract

Potassium (K) adsorption on coronene, picene and [6]phenacene monolayers, which serves as a model system for the metal-intercalated aromatic superconductors, was studied in a molecular scale. Scanning tunneling microscopy (STM) on the K-doped monolayers revealed drastic rearrangements of the molecular layers. Besides the overall similarity of the molecular arrangement in the doped phase, fine structures and unit cell sizes were different, depending on the host molecules. The overall similarity in the structures of the K-doped monolayers should be in close relation to the superconductivity on these systems. © 2014 The Surface Science Society of Japan.