Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity - Poster Session
TT 30.20: Poster
Montag, 31. März 2014, 15:00–19:00, P2
Electronic properties of undoped and doped aromatic hydrocarbon systems — •Friedrich Roth1, Benjamin Mahns2, Eric Müller2, Bernd Büchner2, and Martin Knupfer2 — 1Center for Free-Electron Laser Science / DESY, Notkestraße 85, D-22607 Hamburg, Germany — 2Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
Tuning the electronic structure and carrier density by intercalation is crucial to modern day semiconductor technology. In general, the carrier density plays a pivotal role for the materials properties, because intercalation can induce, e. g., a charge transfer, a shift of the Fermi energy and in general wide-ranging changes in the electronic properties of the system. Furthermore, the prerequisite for the understanding of physical properties of new materials is the knowledge of the electronic structure, both in the undoped as well as in the intercalated phase. After the discovery of superconductivity in potassium doped picene with a rather high transition temperature (of 18 K) polyaromatic hydrocarbons came back into the focus of researcher. In this context, this work presents a summary of the investigations on the electronic structure of several aromatic hydrocarbon systems using electron energy-loss spectroscopy (EELS).