Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
DS: Fachverband Dünne Schichten
DS 31: Molecular Spintronics - Current Status and Challenges I (Focused Session)
DS 31.4: Vortrag
Donnerstag, 25. März 2010, 11:45–12:00, H2
Magnetic transition metal phthalocyanine thin films: electronic properties via K doping — •Olga Molodtsova1, Victor Aristov1,2, Volodymyr Maslyuk3, Denis Vyalikh4, Alexei Preobrajenski5, Ingrid Mertig3, Thomas Bredow6, and Martin Knupfer1 — 1IFW Dresden, Germany — 2ISSP RAS, Russia — 3Uni Halle, Germany — 4TU Dresden, Germany — 5Max-Lab Lund, Sweden — 6Uni Bonn, Germany
Magnetic transition metal phthalocyanines (MTM-Pc's) are considered as materials for development of low dimensional molecular magnets and quantum computers. To make further progress in development such devices both the understanding and the tailoring of the physical, chemical and transport properties of the organic semiconductor components are required. Due to the exceptional ability to incorporate electron acceptors and/or donors into molecular crystals the control of their electronic properties is possible. In this work the evolution of electronic structure of the MTM-Pc's with potassium doping has been studied by means of photoemission spectroscopy, near-edge X-ray absorption fine structure and DFT calculations. The DFT calculations and detailed analysis of the core-level spectra permit us to suggest possible lattice sites for the potassium ions. The data disclosed filling of the lowest unoccupied molecular orbital upon doping and associated changes of the core level absorption spectra. None of the films prepared in our studies showed a finite electronic density of states at the Fermi level. Acknowledgements: This work was supported by the RFBR under grant no. 08-02-01170.