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Long-range charge-density-wave proximity effect at cuprate/manganate interfaces

Nature Materials volume 15, pages 831–834 (2016)Cite this article

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Abstract

The interplay between charge density waves (CDWs) and high-temperature superconductivity is currently under intense investigation1,2,3,4,5,6,7,8,9,10. Experimental research on this issue is difficult because CDW formation in bulk copper oxides is strongly influenced by random disorder11,12,13, and a long-range-ordered CDW state in high magnetic fields14,15,16 is difficult to access with spectroscopic and diffraction probes. Here we use resonant X-ray scattering in zero magnetic field to show that interfaces with the metallic ferromagnet La2/3Ca1/3MnO3 greatly enhance CDW formation in the optimally doped high-temperature superconductor YBa2Cu3O6+δ (δ ∼ 1), and that this effect persists over several tens of nanometres. The wavevector of the incommensurate CDW serves as an internal calibration standard of the charge carrier concentration, which allows us to rule out any significant influence of oxygen non-stoichiometry, and to attribute the observed phenomenon to a genuine electronic proximity effect. Long-range proximity effects induced by heterointerfaces thus offer a powerful method to stabilize the charge-density-wave state in the cuprates and, more generally, to manipulate the interplay between different collective phenomena in metal oxides.

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Figure 1: Resonant X-ray scattering from YCBO–LCMO superlattices.
Figure 2: Tomographic view of a 50-nm-thick YBCO layer in a YBCO–LCMO SL.
Figure 3: Temperature dependence of the RXS intensity for a SL with 50-nm-thick YBCO.
Figure 4: Magnetic field dependence of the RXS intensity for a SL with 50-nm-thick YBCO.

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Acknowledgements

We acknowledge fruitful discussions with V. Hinkov, V. Zabolotnyy, A. Charnukha, G. Sawatzky and C. Bernhard. This work was partly funded by the Deutsche Forschungsgemeinschaft within the framework of the SFB/TRR 80.

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Author notes

  1. A. Frano, S. Blanco-Canosa & M. Le Tacon

    Present address: Present addresses: Materials Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA (A.F.); CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain (S.B.-C.); Institut für Festkörperphysik, Karlsruher Institut für Technologie, Postfach 3640, D-76021 Karlsruhe, Germany (M.L.T.).,

Authors and Affiliations

  1. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

    A. Frano, S. Blanco-Canosa, Y. Lu, M. Wu, M. Bluschke, M. Minola, G. Christiani, H. U. Habermeier, G. Logvenov, Y. Wang, P. A. van Aken, E. Benckiser, M. Le Tacon & B. Keimer

  2. Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany

    A. Frano, E. Schierle, M. Bluschke & E. Weschke

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Contributions

G.C., H.U.H. and G.L. synthesized the thin-film and superlattice samples. A.F., S.B.-C., E.S., Y.L., M.W., M.B. and M.M. performed the sample characterization and the X-ray scattering experiments. A.F., M.B. and M.L.T. analysed the X-ray data. Y.W. and P.A.v.A. performed the TEM experiments. A.F. and B.K. wrote the manuscript, with contributions from all coauthors. E.B., E.W., M.L.T. and B.K. directed the project.

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Correspondence to B. Keimer.

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Frano, A., Blanco-Canosa, S., Schierle, E. et al. Long-range charge-density-wave proximity effect at cuprate/manganate interfaces. Nature Mater 15, 831–834 (2016). https://doi.org/10.1038/nmat4682

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