Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 35: CE: Low-dimensional Systems - Materials 3

TT 35.13: Talk

Wednesday, March 16, 2011, 17:30–17:45, HSZ 301

Thin films and single crystals of new organic charge transfer salts — •Milan Rudloff and Michael Huth — Physikalisches Institut, Goethe-Universität, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main

We synthesized and characterized both, thin films and single crystals of several new organic charge transfer (CT) systems. In general these materials consist of donor and acceptor molecules that show an additional electrostatic attraction induced by Coulomb interaction between donor and acceptor. The electronic behaviour of the resulting new complex (depending on crystal structure, temperature and pressure) can be insulating, semiconducting, metallic or superconducting.
The thin films were prepared by organic molecular beam deposition (OMBD) while single crystals were grown from solution. Samples were primarily characterized by light microscopy, X-ray diffractometry and (temperature dependent) transport measurements.
We succeeded in synthesizing a series of CT salts and thus extended the material base of CT thin films. The results presented here focus on the system 4,5,9,10-Tetramethoxypyrene-9-Dicyanomethylene-2-4-7-trinitrofluorene, especially its electronic transport characteristics.