Proving High Temperature Superconductivity in Monolayer Bi<sub>2</sub>Sr<sub>2-x</sub>La<sub>x</sub>CuO<sub>6+δ</sub>

ORAL

Abstract

Dimensionality plays a fundamental role in cuprate high-temperature superconductivity; all high-temperature cuprate superconductors adopt a layered crystal structure, and much of high-temperature superconductivity theory is based on purely two-dimensional (2D) models. A monolayer Bi2201 contains only a single layer of CuO2 plane, and therefore represents a cuprate superconductor in the ultimate 2D limit. Here, we exfoliate La doped Bi2201 (Bi2Sr2-xLaxCuO6+δ) single crystals down to monolayer (i.e. half unit cell) for transport measurements. We are able to tune the doping level of Bi2201 by annealing the sample in vacuum or ozone, and study the strongly correlated electronic states in Bi2201 over the entire phase diagram in a single sample. In addition, we probe the electronic structure of monolayer Bi2201 at atomic scale using scanning tunnelling microscopy and spectroscopy.

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Presenters

  • Hengsheng Luo

    • Fudan Univ

Authors

  • Hengsheng Luo

    • Fudan Univ

  • Liguo Ma

    • Fudan University
    • Fudan Univ

  • Yijun Yu

    • Fudan University
    • Fudan Univ

  • Peng Cai

    • Fudan University
    • Fudan Univ

  • Dongjoon Song

    • National Institute of Advanced Industrial Science and Technology

  • Ruidan Zhong

    • Brookhaven National Laboratory
    • Brookhaven National Lab

  • Jian Shen

    • Fudan University
    • Fudan Univ

  • Genda Gu

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory
    • Brookhaven national lab
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Brookhaven National Lab
    • Condensed Matter Physics and Material Science, Brookhaven National Laboratory, Upton, NY, United States
    • Brookhaven National Laboratories
    • Condensed Matter Physics and Material Science Division, Brookhaven National Laboratory

  • Hiroshi Eisaki

    • AIST, Japan
    • National Institute of Advanced Industrial Science and Technology
    • The National Institute of Advanced Industrial Science and Technology
    • National Institute of Advanced Industrial Science and Technology, Japan

  • Xianhui Chen

    • University of Science and Technology of China
    • Nanjing University
    • physics department, University of Science and Technology of China

  • Yuanbo Zhang

    • Fudan University
    • Fudan Univ