C. Girardeaux, et al.
J. Phys. IV France 132 (2006) 1-5
Electronic structure of organic titanium bis-phthalocyanine on InAs(001)4 2-c(8 2)P. De Padova1, C. Quaresima1, P. Perfetti1, B. Olivieri2, M.C. Richter3, O. Heckmann3, M. Zerrouki3, G. Pennesi4, A.M. Paoletti4, G. Rossi4 and K. Hricovini3
1 CNR-ISM, via Fosso del Cavaliere, 00133 Roma, Italy
2 CNR-ISAC, via Fosso del Cavaliere, 00133 Roma, Italy
3 LMPS, Université de Cergy-Pontoise, Neuville/Oise, 95031 Cergy-Pontoise, France
4 CNR-ISM, via Salaria km 29,300 CP 10, 00016 Monterotondo Stazione, Italy
We investigated the electronic structure of ultra thin interface of organic titanium bis-phthalocyanine TiPc2 deposited on InAs(001)()c-() clean surface, by means of high-resolution core-levels and valence band (VB) photoelectron spectroscopies. In4d, As3d, and C1s core levels were measured for different TiPc2 thicknesses up to 1 monolayer. Surface core level shifts were found on both In4d and As3d core levels. These shifts originate from the interaction between c() InAs reconstruction and organic molecules suggesting the presence of strong bounds. C1s core level exhibits a line shape attributed to the C-C and C-N bonds. The VB spectroscopy shows dramatic changes related to the interaction of the TiPc2 molecule with the InAs related surface states.
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