Charge Order, Superconductivity and Pseudogap in Y<sub>1- x</sub>Pr<sub>x</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> Thin Films

Oral-In-person  · Withdrawn

Abstract

Y1-xPrxBa2Cu3O7 (YPrBCO) is an exceptional cuprate, as the only member of the RBCO (R = rare earth) family where superconductivity can be suppressed by Pr-doping without changing oxygen content, and where incommensurate charge order prevails deep into the insulating Mott limit (x = 1) and coincides with the pseudogap at intermediate Pr-doping [1]. This talk reports on a study of the interplay between the charge order, superconductivity and pseudogap in YPrBCO, using oxygen isotope substitution to vary the electron-phonon interactions [2]. We grew epitaxial YPrBCO thin films by pulsed laser deposition and substituted 16O by 18O by gas-phase diffusion, which was confirmed by Raman spectroscopy and scanning transmission electron microscopy. The superconducting critical temperature (Tc), pseudogap onset temperature (T*) and charge-order onset temperature (Tco) were measured using electrical transport and resonant X-ray scattering. The observed isotope shifts of Tc, T* and Tco are analyzed to elucidate the physical relationship between these distinct types of electronic order in cuprates.

[1] M. Kang et al., Proceedings of the National Academy of Sciences 120 (2023)

[2] G. Zhao et al., Physical Review B 51 16487 (1995)

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Presenters

  • John Wei

    • University of Toronto

Authors

  • John Wei

    • University of Toronto

  • Chao Zhang

    • University of Toronto

  • Sahaj Patel

    • Massachusetts Institute of Technology

  • Jiarui Li

    • Stanford University

  • Armond Khodagulyan

    • California State University, Los Angeles

  • Oscar Bernal

    • California State University, Los Angeles

  • Guo-Meng Zhao

  • Joaquin Reyes-Gonzalez

  • Maureen Lagos

    • McMaster University

  • Mingu Kang

    • Cornell University

  • Riccardo Comin

    • Massachusetts Institute of Technology