Visualizing short-range charge transfer at the interfaces between ferromagnetic and superconducting oxides

Te Yu Chien, Lena F. Kourkoutis, Jak Chakhalian, Benjamin Gray, Michael Kareev, Nathan P. Guisinger, David A. Muller, John W. Freeland

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

The interplay between antagonistic superconductivity and ferromagnetism has been a interesting playground to explore the interaction between competing ground states. Although this effect in systems of conventional superconductors is better understood, the framework of the proximity effect at complex-oxide-based superconductor/ferromagnet interfaces is not so clear. The main difficulty originates from the lack of experimental tools capable of probing the interfaces directly with high spatial resolution. Here we harness cross-sectional scanning tunnelling microscopy and spectroscopy together with atomic-resolution electron microscopy to understand the buried interfaces between cuprate and manganite layers. The results show that the fundamental length scale of the electronic evolution between YBa2Cu 3O7-δ (YBCO) and La2/3Ca 1/3MnO3 (LCMO) is confined to the subnanometre range. Our findings provide a complete and direct microscopic picture of the electronic transition across the YBCO/LCMO interfaces, which is an important step towards understanding the competition between ferromagnetism and superconductivity in complex-oxide heterostructures.

Original languageEnglish (US)
Article number2336
JournalNature communications
Volume4
DOIs
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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