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

McHalwat M.; Ulrichs Henning; Walowski Jakob; Ballani Camillo; Shapoval Oleg M.; Moshnyaga Vasily T.; Munzenberg Markus G.; Samwer Konrad H.

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2018-05-17 16:45

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MCHALWAT, M., ULRICHS, Henning, WALOWSKI, Jakob, BALLANI, Camillo, SHAPOVAL, Oleg M., MOSHNYAGA, Vasily T., MUNZENBERG, Markus G., SAMWER, Konrad H.. 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, vol. 30, p. 0. ISSN 0953-8984. DOI: https://doi.org/10.1088/1361-648X/aa9fa1

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Journal of Physics Condensed Matter

Volumul 30 / 2018 / ISSN 0953-8984 /ISSNe 1361-648X

Laser-induced changes of nonlinear electronic transport properties in La_0.75Ba_0.25MnO₃ and (La_0.6Pr_0.4)_0.67Ca_0.33MnO₃

DOI:https://doi.org/10.1088/1361-648X/aa9fa1

Pag. 0-0

McHalwat M.¹, Ulrichs Henning¹, Walowski Jakob², Ballani Camillo¹³, Shapoval Oleg M.⁴⁵, Moshnyaga Vasily T.⁴, Munzenberg Markus G.², Samwer Konrad H.⁴

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

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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 La_0.75Ba_0.25MnO₃ (LBMO) and (La_0.6Pr_0.4)_0.67Ca_0.33MnO₃ (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

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<title xml:lang='en'>Laser-induced changes of nonlinear electronic transport properties in La0.75Ba0.25MnO3 and (La0.6Pr0.4)0.67Ca0.33MnO3</title>
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<subject>LPCMO</subject>
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