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Journal Article

Strain effects on the polaron binding energy in PrBa2Cu3O7-δ thin films

MPS-Authors
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Soltan,  S.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Ulrich,  C.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Cristiani,  G.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Habermeier,  H.-U.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Soltan, S., Ulrich, C., Cristiani, G., & Habermeier, H.-U. (2004). Strain effects on the polaron binding energy in PrBa2Cu3O7-δ thin films. Physica C, 403(4), 269-275.


Cite as: https://hdl.handle.net/21.11116/0000-000E-F88B-E
Abstract
We report a systematic study of the strain effect on thin films of
nonsuperconducting PrBa2Cu3O7-delta produced by pulsed laser
deposition. The transport properties and the Raman active modes are
studied for high-quality PrBa2Cu3O7-delta thin films grown on SrTiO3
(100) under a tensile strain, and under a compression strain on
LaSrAlO4 (001) substrate. The data show a lowering of the polaron
binding energy for the samples under compressive strain, as the film
thickness decreases. This can be directly concluded from the behavior
of the Raman active modes. These modes show a shift of the stretching
modes, shifted to lower wave number (cm(-1)) under the tensile strain,
and to higher wave number. under compressive strain. Our results are
analyzed in terms of the Fehrenbacher and Rice-model. (C) 2004 Elsevier
B.V. All rights reserved.