Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 19: POSTER Ia
MA 19.59: Poster
Dienstag, 17. März 2015, 09:30–13:00, Poster A
Laser-induced changes of electronic transport properties in manganites — •Manuel Mchalwat1, Henning Ulrichs1, Bernd Damaschke1, Vasily Moshnyaga1, Markus Münzenberg2, and Konrad Samwer1 — 11. Physikalisches Institut, Georg-August-Universität, Göttingen — 2Institut für Physik, Ernst-Moritz-Arndt Universität, Greifswald
Manganites show structural phenomena at a variety of spatial and time scales ranging from nanometers and picoseconds for single polarons up to microns and seconds for the electronic phase separation. Many of these influence physical properties, e. g. the metal-insulator transition, which is accompanied by a change of the crystal structure and believed to be driven by the formation of correlated polarons near the transition temperature.
By exciting the sample near the transition by short laser pulses we change the electronic tranport properties by influencing the electronic correlations. These changes show up in a change in the third harmonic voltage.
The work has been supported by the DFG through SFB 1073 TP B01 and by Femtolasers.