Tunable high-temperature superconductivity in monolayer Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub>

ORAL

Abstract

Dimensionality plays a central role in high-temperature superconductivity (HTS). Layered cuprate superconductors hold the record of Tc at ambient pressure. Cuprates in the two-dimensional (2D) limit would provide valuable insights on the nature of HTS and offer unprecedented tunability in their material properties. Half-unit-cell-thick single crystal of Bi2Sr2CaCu2O8+δ (referred to as monolayer Bi-2212) is such an ideal 2D system. Here we fabricate transport devices from monolayer Bi-2212 samples obtained by exfoliation and study the evolution of superconductivity as the dimensionality and doping level is varied. We find that superconductivity remains intact in monolayer Bi-2212. Finite size scaling analysis at superconductor-to-insulator transition (SIT) reveals distinct critical behaviors at different disorder levels. Our study leads to a unified picture of SITs previously reported in cuprate systems.

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Presenters

  • Yijun Yu

    • Fudan University
    • Physics Department, Fudan University

Authors

  • Yijun Yu

    • Fudan University
    • Physics Department, Fudan University

  • Liguo Ma

    • Fudan University
    • Physics Department, Fudan University

  • Peng Cai

    • Fudan University
    • Physics Department, Fudan University

  • Ruidan Zhong

    • Brookhaven National Lab
    • Department of Chemistry, Princeton University
    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science, Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Laboratories

  • Cun Ye

    • Fudan University
    • Physics Department, Fudan University

  • Jian Shen

    • Fudan University
    • Physics Department, Fudan University

  • Genda Gu

    • Brookhaven National Laboratory
    • Brookhaven National Lab
    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Cond. Matt. Physics and Material Science, Brookhaven Natl Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Labs, Long Island, NY, USA, 11973
    • Condensed Matter Physics & Materials Science, Brookhaven National Laboratory
    • Condensed Matter Physics, Brookhaven National Laboratory
    • Brookhaven National Laboratories
    • Chinese Academy of Sciences
    • Condensed Matter Physics & Materials Science, Brookhaven National Lab
    • Brookhaven Natl Lab

  • Xianhui Chen

    • University of Science and Technology of China
    • Department of physics, University of Science and Technology of China

  • Yuanbo Zhang

    • Fudan University
    • State Key Laboratory of Surface Physics and Department of Physics, Fudan University
    • Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China
    • Dept. of Physics, Fudan University
    • Physics Department, Fudan University