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Paper detail

Persistent photoconductivity in oxygen deficient YBCO/LCMO superlattices grown by PLD

We report a large persistent photoconductivity (PPC) in oxygen reduced PLD grown YBa2Cu3O7-δ/La2/3Ca1/3MnO3-y (YBCO/LCMO) superlattices scaling with the oxygen deficiency and being similar to that observed in single layer YBa2Cu3O7-δ films. These results contradict previous observations where in sputtered bilayer samples only a transient photoconductivity (TPC) was found. We argue that the PPC effect in superlattices is caused by the PPC effect due to the YBa2Cu3O7-x layers with limited charge transfer to La2/3Ca1/3MnO3-y. The discrepancy arises from the different permeability of charges across the interface and shed light on the sensitivity of oxide interface properties on details of their preparation.

preprint2013arXivOpen access
K. KawashimaS. SoltanG. LogvenovH. -U. Habermeier
cond-mat.str-elcond-mat.mtrl-sci
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K. KawashimaS. SoltanG. LogvenovH. -U. Habermeier

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