Signatures of pressure-induced superconductivity in insulating Bi1.98Sr2.06Y0.68CaCu2O8+δ

T. Cuk, D. A. Zocco, H. Eisaki, V. Struzhkin, F. M. Grosche, M. B. Maple, and Z.-X. Shen
Phys. Rev. B 81, 184509 – Published 12 May 2010
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  • INTRODUCTION
  • EXPERIMENTAL DETAILS
  • RESULTS
  • DISCUSSION AND SUMMARY
  • ACKNOWLEDGEMENTS
    • References

    Abstract

    We have performed several high-pressure electrical resistance experiments on Bi1.98Sr2.06Y0.68Cu2O8+δ (Bi2212), an insulating parent compound of the high-Tc Bi2212 family of copper oxide superconductors. We find a resistive anomaly, a downturn at low temperature, that onsets with applied pressure in the 20–40 kbar range. Through both resistance and magnetoresistance measurements, we identify this anomaly as a signature of induced superconductivity. Resistance to higher pressures decreases Tc, giving a maximum of ∼10 K. The higher pressure measurements exhibit a strong sensitivity to the hydrostaticity of the pressure environment. We make comparisons to the pressure-induced superconductivity now ubiquitous in the iron arsenides.

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    • Received 19 February 2010

    DOI:https://doi.org/10.1103/PhysRevB.81.184509

    ©2010 American Physical Society

    Authors & Affiliations

    T. Cuk1, D. A. Zocco2, H. Eisaki3, V. Struzhkin4, F. M. Grosche5, M. B. Maple2, and Z.-X. Shen6

    • 1Materials Science Division, Lawrence Berkeley National Laboratory, University of California-Berkeley, Berkeley, California 94720, USA
    • 2Department of Physics, University of California–San Diego, La Jolla, California 92093, USA
    • 3Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Central 2, Umezono, Tsukuba, Ibaraki 305-8568, Japan
    • 4Geophysical Laboratory, Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington, DC 20015, USA
    • 5Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom
    • 6Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA and Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA

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    Vol. 81, Iss. 18 — 1 May 2010

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