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Persistent photoconductivity in oxygen deficient YBa2Cu3O7-δ/La2/3Ca1/3MnO3-x superlattices grown by pulsed laser deposition

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Soltan,  S.
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;

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Logvenov,  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.
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;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kawashima, K., Soltan, S., Logvenov, G., & Habermeier, H.-U. (2013). Persistent photoconductivity in oxygen deficient YBa2Cu3O7-δ/La2/3Ca1/3MnO3-x superlattices grown by pulsed laser deposition. Applied Physics Letters, 103(12): 122603.


Cite as: https://hdl.handle.net/21.11116/0000-000E-C701-0
Abstract
We report a large persistent photoconductivity (PPC) in oxygen-reduced YBa2Cu3O7-delta/La2/3Ca1/3MnO3-x (YBCO/LCMO) superlattices (SLs) grown by pulsed laser deposition that scales with oxygen deficiency and is similar to that observed in single layer YBa2Cu3O7-delta films. These results contradict the previous observations, where in sputtered bilayer samples only a transient photoconductivity was found. We argue that the PPC effect in superlattices is caused by the PPC effect due to YBa2Cu3O7-delta layers with limited charge transfer to La2/3Ca1/3MnO3-x. The discrepancy arises from the different permeability of charges across the interface and sheds light on the sensitivity of oxide interface properties to details of their preparation. (C) 2013 AIP Publishing LLC.