| Title | Electronic Structure of an Iron-Porphyrin Derivative on Au(111) |
| Authors | Arnulf Stein, Daniela Rolf, Christian Lotze, Constantin Czekelius, Katharina J. Franke, Petra Tegeder |
| Journal | Journal of Physics: Condensed Matter |
| Vol. 31, 2019, pg. 044002 |
| Abstract | Surface-bound porphyrins are promising candidates for molecular switches, electronics and spintronics. Here, we studied the structural and the electronic properties of Fe-tetra-pyridil-porphyrin adsorbed on Au(111) in the monolayer regime. We combined scanning tunneling microscopy/spectroscopy, ultraviolet photoemission, and two-photon photoemission to determine the energy levels of the frontier molecular orbitals. We also resolved an excitonic state with a binding energy of 420 meV, which allowed us to compare the electronic transport gap with the optical gap. |
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