Spatially Resolved Electronic Structure of Bi2Sr2-xLaxCuO6+δ in the Two-dimensional Limit

ORAL

Abstract

Dimensionality plays a fundamental role in high-temperature superconductivity; all high-temperature superconductors adopt a layered crystal structure, and much of high-temperature superconductor theory is based on purely two-dimensional (2D) models. Here we exfoliate Bi2Sr2-xLaxCuO6+δ (referred to as La-Bi2201) single crystals down to monolayers (half unit cell) at liquid nitrogen temperature under ultra-high vacuum. A monolayer La-Bi2201 contains only a single layer of CuO2 plane, and therefore represents a cuprate superconductor in the ultimate 2D limit. We study the electronic structure of monolayer La-Bi2201 at atomic scale using scanning tunnelling microscopy and spectroscopy.

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Presenters

  • Hengsheng Luo

    Physics Department, Fudan University

Authors

  • Hengsheng Luo

    Physics Department, Fudan University

  • Liguo Ma

    Fudan University, Physics Department, Fudan University

  • Peng Cai

    Physics Department, Fudan University, Fudan University

  • Dongjoon Song

    National Institute of Advanced Industrial Science and Technology

  • 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

  • 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

  • Hiroshi Eisaki

    National Institute of Advanced Industrial Science and Technology, AIST, National Inst. Adv. Industrial Science & Technology, Tsukuba, National Institute of Advanced Industrial Science and Technology), Electronics and Photonics Research Institute National Institute of Advanced Industrial Science and Technology, Japan

  • 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