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*, T. Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


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
Issue number25
StatePublished - Dec 20 2010
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Singapore National Research Foundation and the Ministry of Education of Singapore (Grant Nos. AcRF RG30/06, ARC 23/08, and ARC 16/08). J.-M. Liu was supported by NSFC (Grant Nos. 50832002 and 10874085).

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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