Electronic Transport through Electron-Doped Metal Phthalocyanine Materials


  • We thank J. van den Brink and E. Tosatti for useful discussions, Y. Taguchi and T. Miyake for experimental help, A. N. Fitch for help with the diffraction experiments, the ESRF for provision of beamtime and are grateful to AMOLF for the RBS analysis of our samples. This work was financially supported by the stichting FOM, the Netherlands Organization for Scientific Research (MFC), the Royal Dutch Academy of Sciences (KNAW) (SR), the NWO Vernieuwingsimpuls 2000 program (AFM), the Royal Society (Dorothy Hodgkin Research Fellowship to SM) and the Daiwa Foundation (KP).


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Transport measurements for different electron-doped metal phthalocyanine materials demonstrate the possibility to control their electronic properties through alkali intercalation. In these materials, increasing the potassium concentration results in the formation of a doping-induced metallic state (see Figure and Inside Cover). Further doping brings the materials back into the insulating state.