Ab initio study of origin and properties of a metal-organic interface state of the PTCDA/Ag(111) system

Autor:	Zaitsev, N. L., Nechaev, I. A., Echenique, P. M., Chulkov, E. V.
Rok vydání:	2010
Předmět:	Condensed Matter - Materials Science Condensed Matter - Other Condensed Matter
Druh dokumentu:	Working Paper
Popis:	We present a detailed study of a monolayer film of 3,4,9,10-perylene-tetracarboxylic acid dianhydride (PTCDA) on Ag(111) (the PTCDA/Ag(111) system). The study is done within density functional theory with the use of the periodic slab model. The slab is chosen to contain a PTCDA monolayer film on a silver thin film of different thicknesses (6, 9, and 12 layers) with the (111) orientation. We show that one of two surface states of the pure Ag(111) films transforms into an unoccupied interface state due to the adsorbate-substrate interaction. The relation of the resulting state to the unoccupied state that has been experimentally observed in the PTCDA/Ag(111) system by scanning tunneling and two photon photoemission spectroscopy is discussed. Comment: 6 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1004.5075 Zobrazit plný text záznamu View this record from Arxiv