DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 10: Poster I

MA 10.74: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Large photoconductivity of La0.7Ca0.3MnO3−δ/SrTiO3 heterostructures — •Elke Beyreuther1, Andreas Thiessen1, Stefan Grafström1, Kathrin Dörr2, and Lukas M. Eng11Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden — 2Institut für Metallische Werkstoffe, IFW Dresden, D-01171 Dresden

The electric resistivity of stoichiometric and oxygen-deficient epitaxial 10-nm-thick La0.7Ca0.3MnO3 thin films on SrTiO3 under photoexcitation has been investigated systematically. In contrast to the as-prepared film, the oxygen-deficient one exhibits a pronounced photoinduced decrease of the resistivity of up to five orders of magnitude at low temperatures.

A detailed analysis of the resistivity as a function of illumination intensity and wavelength (visible to ultraviolet range) is presented for the bare substrate as well as for the film/substrate heterostructure. The roles of carrier generation in the film and carrier injection from the substrate, which both contribute to the observed effects, are discussed.


This document was translated from LATEX by HEVEA.
100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2010 > Regensburg