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The low-temperature electric conductivity of YBaCuO and LaSrMnO dielectric films obtained by a pulsed laser sputter deposition technique

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Abstract

We have studied the electric conductivity of YBaCuO and LaSrMnO dielectric films obtained by pulsed laser sputtering of targets possessing metallic conductivity. The plots of the sample resistance versus temperature R=R(T) measured at T<T cr(T cr=160–240 K) exhibit regions where R is independent of the temperature. This phenomenon is probably related to manifestations of the quantum confinement effects upon the conversion of small grains into quantum dots. In the region of T<T cr, the electric conductivity of the system is determined by a mechanism of the phononless electron tunneling with participation of the atomic-type states belonging to small grains (clusters) featuring metallic conductivity in the amorphous matrix.

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Authors and Affiliations

  1. Donetsk Physicotechnical Institute, National Academy of Sciences of Ukraine, Donetsk, Ukraine

    V. D. Okunev, N. N. Pafomov & A. Abaleshev

  2. Institute of Physics, Polish Academy of Sciences, Warsaw, Poland

    H. Belska-Lewandowska, P. Gierlowski, A. Klimov & S. Lewandowski

Authors
  1. V. D. Okunev
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  2. N. N. Pafomov
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  3. A. Abaleshev
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  4. H. Belska-Lewandowska
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  5. P. Gierlowski
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  6. A. Klimov
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  7. S. Lewandowski
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 26, No. 20, 2000, pp. 20–27.

Original Russian Text Copyright © 2000 by Okunev, Pafomov, Abaleshev, Belska-Lewandowska, Gierlowski, Klimov, Lewandowski.

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Okunev, V.D., Pafomov, N.N., Abaleshev, A. et al. The low-temperature electric conductivity of YBaCuO and LaSrMnO dielectric films obtained by a pulsed laser sputter deposition technique. Tech. Phys. Lett. 26, 903–906 (2000). https://doi.org/10.1134/1.1321234

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