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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.