Magnetic-field-tuned superconducting quantum phase transition in highly overdoped Bi2+xSr2-xCuO6+δ

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.

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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