Visualizing the unusual spectral weight shift in DyBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> thin film

ORAL

Abstract

As a member of Rare-earth barium copper oxides (Re-123) high temperature superconductors, DyBa2Cu3O7-δ (DBCO) may help understanding the material specifics in the electronic structures of cuprates, but not many studies have been reported yet. Here we report a spectroscopic imaging scanning tunneling microscopy (SI-STM) study of DyBa2Cu3O7-δ thin film, which is synthesized by oxide molecular beam epitaxy (MBE). A mutual conductance measurement shows that the critical temperature Tc is around 78K. In the SI-STM measurements, we have observed an unusual spectral weight transfer in the local density of states spectra, simultaneously forming multiple ring-like patterns in the local density of states maps. By changing the resistance between tip and sample, we also found that such spectral weight transfer showed a junction resistance dependence. In this talk, we will discuss these unusual phenomena and possible implications.

*This work was supported by the US Department of Energy, Office of Basic Energy Sciences, contract no. DE-SC0012704.

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Presenters

  • Hui Li

    • Brookhaven National Laboratory

Authors

  • Hui Li

    • Brookhaven National Laboratory

  • Zengyi Du

    • Brookhaven National Laboratory

  • Zebin Wu

    • Brookhaven National Laboratory

  • Daniel Putzky

    • Max Planck Institute for Solid State Research

  • Asish Kumar Kundu

    • Brookhaven National Laboratory

  • Shize Yang

    • Brookhaven National Laboratory

  • Sanghyun Joo

    • Seoul National University

  • Jinho Lee

    • Seoul National University

  • Yimei Zhu

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Lab
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory
    • Condensed Matter Physics, Brookhaven National Laboratory

  • Gennady Logvenov

    • Max Planck Institute for Solid State Research

  • Bernhard Keimer

    • Max Planck Inst for Solid State Research
    • Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
    • Max Planck Institute for Solid State Physics
    • Max Planck Institute for Solid State Research
    • Solid State spectroscopy, Max Planck Institute for Solid State Research
    • Max Planck Institute for Solid State Research, Stuttgart, Germany

  • Kazuhiro Fujita

    • CMPMS, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • Tonica Valla

    • Brookhaven National Laboratory

  • Ivan Bozovic

    • Department of Chemistry, Yale University
    • Brookhaven National Laboratory
    • Brookhaven National Laboratory and Yale University

  • Ilya K Drozdov

    • Brookhaven National Laboratory