Superconducting gap induced barrier enhancement in a BiFeO3 -based heterostructure

C. L. Lu, Y. Wang, L. You, X. Zhou, H. Y. Peng, G. Z. Xing, E. E.M. Chia, C. Panagopoulos, L. Chen, J. M. Liu, J. Wang*, Tao Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We report the synthesis and characterization of an epitaxial heterostructure composed of multiferroic BiFeO3 and superconducting YBa2 Cu3 O7-δ thin films grown on (001) SrTiO3. Both the superconductivity of YBa2 Cu3 O7-δ and the ferroelectricity of BiFeO3 are retained in the heterostructure. Current density-electric field characteristics measured from 30 to 170 K suggest a Schottky-emission-like transport at the BiFeO 3 / YBa2 Cu3 O7-δ interface. Furthermore, the temperature dependence of the barrier height shows an anomalous enhancement at TC, indicating an intimate coupling between the multiferroic and the superconducting layers.

Original languageEnglish (US)
Article number252905
JournalApplied Physics Letters
Volume97
Issue number25
DOIs
StatePublished - Dec 20 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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