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High-temperature interface superconductivity between metallic and insulating copper oxides

Author

Listed:
  • A. Gozar

    (Brookhaven National Laboratory, Upton, New York 11973-5000, USA)

  • G. Logvenov

    (Brookhaven National Laboratory, Upton, New York 11973-5000, USA)

  • L. Fitting Kourkoutis

    (School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA)

  • A. T. Bollinger

    (Brookhaven National Laboratory, Upton, New York 11973-5000, USA)

  • L. A. Giannuzzi

    (FEI Company, Hillsboro, Oregon 97124, USA)

  • D. A. Muller

    (School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA)

  • I. Bozovic

    (Brookhaven National Laboratory, Upton, New York 11973-5000, USA)

Abstract

Skin-deep superconductivity High-temperature interface superconductivity, confined to nanometre-size interfaces between two non-superconducting materials, has been long sought-after. Theorists speculated about it for forty years, but it has been elusive because of extreme demands on interface perfection and materials parameters. Gozar et al. now report the discovery of interface superconductivity between two non-superconducting cuprates — an insulator (La2CuO4) and a metal (La1.55Sr0.45CuO4). The critical tempeature (Tc) in bilayers is about 15 K or 30 K, depending on the layering sequence. This highly robust phenomenon is confined to within 2 or 3 nanometres of the interface, and if the bilayer is exposed to ozone, Tc rises to over 50 K.

Suggested Citation

  • A. Gozar & G. Logvenov & L. Fitting Kourkoutis & A. T. Bollinger & L. A. Giannuzzi & D. A. Muller & I. Bozovic, 2008. "High-temperature interface superconductivity between metallic and insulating copper oxides," Nature, Nature, vol. 455(7214), pages 782-785, October.
    • Handle: RePEc:nat:nature:v:455:y:2008:i:7214:d:10.1038_nature07293
    DOI: 10.1038/nature07293
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    Cited by:

    1. He Wang & Yanzhao Liu & Ming Gong & Hua Jiang & Xiaoyue Gao & Wenlong Ma & Jiawei Luo & Haoran Ji & Jun Ge & Shuang Jia & Peng Gao & Ziqiang Wang & X. C. Xie & Jian Wang, 2023. "Emergent superconductivity in topological-kagome-magnet/metal heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. J. Y. Shen & C. Y. Shi & Z. M. Pan & L. L. Ju & M. D. Dong & G. F. Chen & Y. C. Zhang & J. K. Yuan & C. J. Wu & Y. W. Xie & J. Wu, 2023. "Reentrance of interface superconductivity in a high-Tc cuprate heterostructure," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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