Laser-induced changes of nonlinear electronic transport properties in La0.75Ba0.25MnO3 and (La0.6Pr0.4)0.67Ca0.33MnO3
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2018-05-17 16:45
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MCHALWAT, M.; ULRICHS, Henning; WALOWSKI, Jakob; BALLANI, Camillo; SHAPOVAL, Oleg; MOSHNYAGA, Vasily T.; MUNZENBERG, Markus G.; KONRAD, Samwer. Laser-induced changes of nonlinear electronic transport properties in La0.75Ba0.25MnO3 and (La0.6Pr0.4)0.67Ca0.33MnO3. In: Journal of Physics Condensed Matter. 2018, nr. 4(30), p. 0. ISSN 0953-8984.
10.1088/1361-648X/aa9fa1
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Journal of Physics Condensed Matter
Numărul 4(30) / 2018 / ISSN 0953-8984 /ISSNe 1361-648X

Laser-induced changes of nonlinear electronic transport properties in La0.75Ba0.25MnO3 and (La0.6Pr0.4)0.67Ca0.33MnO3


DOI: 10.1088/1361-648X/aa9fa1
Pag. 0-0

McHalwat M.1, Ulrichs Henning1, Walowski Jakob2, Ballani Camillo13, Shapoval Oleg45, Moshnyaga Vasily T.4, Munzenberg Markus G.2, Konrad Samwer4
 
1 Georg-August-Universitat-Gottingen,
2 Ernst-Moritz-Arndt University Greifswald,
3 Martin-Luther-Universitat Halle-Wittenberg,
4 I. Physikalisches Institut Uni-Goettingen,
5 Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova
 
Disponibil în IBN: 24 februarie 2018


Rezumat

We report photoinduced effects in nonlinear third harmonic ac electric transport-which is a measure for the density of correlated polarons-in thin films of La0.75Ba0.25MnO3 (LBMO) and (La0.6Pr0.4)0.67Ca0.33MnO3 (LPCMO) manganites. Both materials show an enhancement of third harmonic voltage in the vicinity of the metal-to-insulator transition, indicating strong electron-lattice correlations within a phase-separated state. Relatively low laser excitation with a pulse fluence of 11 μJ cm-2 leads to an increase (decrease) in nonlinearity in LBMO (LPCMO). With a high pulse fluence of 8mJ cm-2, we were also able to suppress the correlations in LBMO, which is accompanied by a decrease of third harmonic voltage by 2.5% in our time-averaging measurement technique.

Cuvinte-cheie
correlated polarons, laser excitation, LBMO, LPCMO, manganites, nonlinear electric transport