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Sliding charge-density waves in manganites

Nature Materials volume 9, page 688 (2010)Cite this article

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Cox et al.1 claim charge-density-wave (CDW) sliding in an untwinned epitaxial 80-nm-thick La0.5Ca0.5MnO3 film in which superlattice transmission electron microscopy reflections confirm charge order. Their evidence consists of hysteresis in differential resistance, and broadband noise in the nonlinear conductivity (NLC) regime. However, the measurements were performed using an irregular contact geometry that could support inhomogeneous heating currents, and there is no report of narrow-band noise, which represents the most direct observation of sliding CDWs2.

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Figure 1: TEM and electrical data for our La0.5Ca0.5MnO3 film.

References

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Acknowledgements

This work was supported by UK EPSRC grants EP/E03389X and EP/E0026206, The Royal Society (J.C.L.) and the Comissionat per a Universitats i Recerca (CUR) del Departament d'Innovació, Universitats i Empresa, de la Generalitat de Catalunya (X.M.).

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Authors and Affiliations

  1. Department of Physics, Technion, Haifa, 32000, Israel

    B. Fisher, J. Genossar & L. Patlagan

  2. Department of Materials Science, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK

    S. Kar-Narayan, X. Moya, J. C. Loudon & N. D. Mathur

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  1. B. Fisher
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  2. J. Genossar
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  3. L. Patlagan
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  4. S. Kar-Narayan
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  6. J. C. Loudon
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  7. N. D. Mathur
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Correspondence to B. Fisher or N. D. Mathur.

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Fisher, B., Genossar, J., Patlagan, L. et al. Sliding charge-density waves in manganites. Nature Mater 9, 688 (2010). https://doi.org/10.1038/nmat2841

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