ARPES research of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+x</sub> by in-situ doping

ORAL

Abstract

Cuprate high temperature superconductors have been studied 40 years now, but there still are many questions unresolved. A systematic study on cuprates is necessary to figure out these questions. Recently,we succeed in tuning the doping level of Bi2Sr2CaCu2O8+x (Bi2212) in-situ by ozone annealing and vacuum annealing. Compared to the previously angle-resolved photoemission spectroscopy (ARPES) works which carried on different doped samples, our results are more reliable because the we detect the same surface. We tune the doping in a large range, from 0.05 to 0.25, almost including the whole superconducting region. Using in-situ high resolution ARPES, we get the doping evolution of gap, kink and Quasiparticle information. Our work give a overall look of cuprate superconductivity and is helpful to establish the electronic phase diagram in Bi2212 that can be extended to other cuprate superconductors.

*This work was supported by grants from the National Natural Science foundation of China.

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Presenters

  • Yigui Zhong

    • Institute of physics, Chinese Academy of Sciences

Authors

  • Yigui Zhong

    • Institute of physics, Chinese Academy of Sciences

  • Jianyu Guan

    • Institute of Physics, Chinese Academy of Sciecses
    • Institute of physics, Chinese Academy of Sciences

  • Zheng-Yu Weng

    • Tsinghua University
    • Institute for Advanced Study, Tsinghua University

  • Ziqiang Wang

    • Boston College
    • Department of Physics, Boston Coll
    • Boston university
    • Department of Physics, Boston College
    • Boston Coll

  • Genda Gu

    • Brookhaven National Laboratory
    • Brookhaven National Labs
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory
    • Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory
    • Condensed Matter &materials Science, Brookhaven Natl Lab
    • Brookhaven Natl Lab
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Brookhaven Natl. Lab
    • Brookhaven National Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • brookhaven national laboratory

  • Yujie Sun

    • Institute of physics, Chinese Academy of Sciences

  • Hong Ding

    • Insititute of Physics, Chinese Academy of Scienes (CAS)
    • Institute of Physics, Chinese Academy of Sciences
    • Institute of physics, Chinese Academy of Sciences