Magnetic-field-tuned superconducting quantum phase transition in highly overdoped Bi<sub>2+x</sub>Sr<sub>2-x</sub>CuO<sub>6+δ</sub>

ORAL

Abstract

The conventional picture of overdoped cuprates as BCS d-wave superconductors has been recently challenged, with the roles of disorder and quantum fluctuations under debate. To address these questions, we focus on the highly overdoped regime, which we have explored via measurements of linear transport and voltage-current characteristics on the hole-doped, La free, Bi2+xSr2-xCuO6+δ (Bi2201) single crystals with zero-resistance transition temperatures Tc ~ 5 K. Measurements were performed in magnetic fields (H) up to 45 T and temperatures (T) down to 17 mK. We discuss the nature of the H-field-tuned superconducting quantum phase transition and the high-field ground state, and present the T-H phase diagram for the highly overdoped Bi2201.

*Supported by NSF DMR-1707785 and NHMFL via NSF DMR-1644779 and the State of Florida.

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Presenters

  • Jasminka Terzic

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab
    • Department of Physics and National High Magnetic Field Lab, Florida State University

Authors

  • Jasminka Terzic

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab
    • Department of Physics and National High Magnetic Field Lab, Florida State University

  • Paul G. Baity

    • Dept. of Phys. & Natl. High Magnetic Field Lab., Florida State Univ.
    • National High Magnetic Field Lab
    • Department of Physics and National High Magnetic Field Lab, Florida State University
    • Dept. of Phys. Natl. High Magnetic Field Lab.

  • Bal K Pokharel

    • Department of Physics and National High Magnetic Field Lab, Florida State University

  • Lily Stanley

    • Department of Physics and National High Magnetic Field Lab, Florida State University
    • Dept. of Phys. Natl. High Magnetic Field Lab.

  • Dragana Popovic

    • Dept. of Phys. & Natl. High Magnetic Field Lab., Florida State Univ.
    • National High Magnetic Field Lab
    • Department of Physics and National High Magnetic Field Lab, Florida State University
    • Dept. of Phys. Natl. High Magnetic Field Lab.

  • Shimpei Ono

    • Central Research Institute of Electric Power Industry (Japan)
    • CRIEPI
    • Central Research Institute of Electric Power Industry, Japan