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The Vanishing Superfluid Density in Cuprates—and Why It Matters

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Abstract

Recently, we have released the results of a comprehensive study of a couple thousand single-crystal La2−xSrxCuO4 films, covering densely the entire overdoped side of the phase diagram (Božović et al. Nature 536, 309–311, 2016; Wu et al. Nature 547, 432–435, 2017). Here, we review the key experimental findings, place them in the context of other important well-established facts and observations, and discuss their implications for our understanding of high-temperature superconductivity in cuprates. We conclude that it involves some new physics that requires going beyond the standard Fermi liquid description of the normal state and Bardeen-Cooper-Schrieffer description of the superconducting state.

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Acknowledgments

This research was done at BNL and was supported by the U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division.

Funding

X.H. is supported by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4410.

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Authors and Affiliations

  1. Brookhaven National Laboratory, Upton, NY, 11973-5000, USA

    I. Božović, X. He, J. Wu & A. T. Bollinger

  2. Department of Applied Physics, Yale University, New Haven, CT, 06511, USA

    I. Božović & X. He

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  1. I. Božović
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  2. X. He
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  4. A. T. Bollinger
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Correspondence to I. Božović.

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Božović, I., He, X., Wu, J. et al. The Vanishing Superfluid Density in Cuprates—and Why It Matters. J Supercond Nov Magn 31, 2683–2690 (2018). https://doi.org/10.1007/s10948-018-4792-7

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  • DOI: https://doi.org/10.1007/s10948-018-4792-7

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