Mapping the electronic structures of a metalloporphyrin molecule on Au(111) by scanning tunneling microscopy and spectroscopy

Howon Kim, Won Joon Son, Won Jun Jang, Jong Keon Yoon, Seungwu Han, Se-Jong Kahng

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The intramolecular structure of a Co-porphyrin molecule adsorbed on Au(111) is studied using scanning tunneling microscopy and spectroscopy. As the energy is swept from -2 to +2eV across Fermi level, the shape of the molecular image dramatically evolves from a two-lobed object to a shape with a bright center and, finally, to a four-lobed object. With the help of first-principles calculations, we explain these distinctive features in terms of the integrated molecular orbitals of a saddle conformation and the contribution of a Kondo state. Based on the molecular structure and the orbitals, we explain why the modification in the electronic states of the molecules by the presence of the substrate is relatively modest.

Original languageEnglish
Article number245402
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number24
DOIs
Publication statusPublished - 2009 Dec 3

Fingerprint

Metalloporphyrins
Scanning tunneling microscopy
Electronic structure
scanning tunneling microscopy
intramolecular structures
Spectroscopy
electronic structure
Molecules
Porphyrins
saddles
Electronic states
Molecular orbitals
Fermi level
porphyrins
Molecular structure
spectroscopy
Conformations
molecules
molecular orbitals
molecular structure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Mapping the electronic structures of a metalloporphyrin molecule on Au(111) by scanning tunneling microscopy and spectroscopy. / Kim, Howon; Son, Won Joon; Jang, Won Jun; Yoon, Jong Keon; Han, Seungwu; Kahng, Se-Jong.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 24, 245402, 03.12.2009.

Research output: Contribution to journalArticle

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