Regensburg 2013 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 12: Poster 1

DF 12.49: Poster

Dienstag, 12. März 2013, 10:30–13:30, Poster D

Autocorrelation measurement with femtosecond laser pulses of correlated polaron dynamics in manganites — •Manuel Mchalwat, Christin Kalkert, Camillo Ballani, Vasily Moshnyaga, Markus Münzenberg, and Konrad Samwer — 1. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

In manganites the spatial and time scales of correlations range from microns and seconds as for the electronic phase separation down to 1 … 2 nm and femtoseconds as for the Jahn-Teller polarons. Recently it was shown that the third harmonic voltage in electrical transport is proportional to the concentration of correlated polarons. To get access to the their ultrafast dynamics we performend an autocorrelation measurement of the third harmonic voltage with femtosecond laser pulses thus photo-inducing correlated polarons. Further we discuss our results with respect to thermal and non-thermal influences.

The work has been supported by the DFG through SFB 602 TP A2 and by Femtolasers.