We report a large persistent photoconductivity (PPC) in oxygen reduced PLD grown YBa2Cu3O7-{\delta}/La2/3Ca1/3MnO3-y (YBCO/LCMO) superlattices scaling with the oxygen deficiency and being similar to that observed in single layer YBa2Cu3O7-{\delta} 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.
@article{arxiv.1309.1295,
title = {Persistent photoconductivity in oxygen deficient YBCO/LCMO superlattices grown by PLD},
author = {K. Kawashima and S. Soltan and G. Logvenov and H. -U. Habermeier},
journal= {arXiv preprint arXiv:1309.1295},
year = {2013}
}