Visualizing the electronic structure of monolayer Bi2Sr2CaCu2O8+δ

ORAL

Abstract

Although high-temperature superconductors are a complex and diverse family of materials, they all adopt a layered crystal structure, in which two-dimensional lattices stack together to form the three-dimensional bulk. This curious fact begs the question: does high-temperature superconductivity (HTS) exist in an isolated monolayer, and if so, is the two-dimensional HTS—and various other correlated phenomena related to HTS—different from its three-dimensional counterpart? The answer to these questions may provide important insights on the role of dimensionality in HTS. Here, we fabricate atomically thin cuprate Bi2Sr2CaCu2O8+δ that retains HTS down to monolayer (i.e. half unit cell) limit. The electronic structure of monolayer Bi2Sr2CaCu2O8+δ is probed with scanning tunneling microscopy and spectroscopy. Survey of the electronic phases – superconductivity, pseudogap, charge order and Mott insulating state – reveals that they are indistinguishable from those in the bulk. Out results, therefore, indicates that essential physics of HTS is contained in a monolayer Bi2Sr2CaCu2O8+δ.

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Presenters

  • Liguo Ma

    Fudan University, Physics Department, Fudan University

Authors

  • Liguo Ma

    Fudan University, Physics Department, Fudan University

  • Yijun Yu

    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

    Physics Department, Fudan University