The c-axis characterizations of Bi2Sr2CaCu2O8+δ films grown by liquid-phase epitaxy for THz applications

ORAL

Abstract

Intrinsic Josephson junctions (IJJ) in the high-Tc superconducting Bi2Sr2CaCu2O8+δ (Bi-2212) exhibit the fundamental phenomena associated with the Josephson effect opening an avenue towards compact THz chip system with integrated Josephson plasma wave devices for THz applications. To realize the THz-on-a-chip concept, we have grown high-quality and thick epitaxial Bi-2212 films by liquid-phase epitaxy (LPE). The structural and stoichiometric characterizations of our best films by XRD and EDS confirm single-phase, highly c-axis aligned crystalline Bi-2212 films. Sharp superconducting transitions in transport measurements on annealed films occur at approximately 85K. In the c-axis transport measurements, we have observed strongly hysteretic I-V characteristics with relatively high Jc of 600 A/cm2 which is a clear signature of underdamped IJJs and a prerequisite for THz generation. We will discuss LPE growth conditions allowing to improve the size of single phase Bi-2212 grains and their structural and superconducting properties for leading to the THz-on-a-chip systems.

*This work was supported by the U.S. DOE, BES. Use of the Center for Nanoscale Materials and Office of Science user facilities were supported by the U. S. DOE, BES.

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Presenters

  • Yilmaz Simsek

    • Materials Science Division, Argonne National laboratory
    • Argonne National Laboratory

Authors

  • Yilmaz Simsek

    • Materials Science Division, Argonne National laboratory
    • Argonne National Laboratory

  • Vitalii Vlasko-Vlasov

    • Materials Science Division, Argonne National laboratory
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne Natlonal Lab

  • Manabu Tsujimoto

    • Graduate School of Pure and Applied Sciences, University of Tsukuba
    • University of Tsukuba
    • Univ of Tsukuba

  • Timothy Benseman

    • Department of Physics, CUNY Queens College
    • Physics, Queens College CUNY
    • City University of New York, Queens Colledge

  • Alexei Koshelev

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory
    • Materials Science Division, Argonne National laboratory
    • Argonne Natl Lab

  • ibrahim kesgin

    • Advanced Photon Source, Argonne National laboratory

  • Yang Hao

    • Department of Physics, University of Illinois at Chicago

  • Helmut claus

    • Materials Science Division, Argonne National laboratory
    • Argonne Natl Lab

  • John Pearson

    • Materials Science Division, Argonne National laboratory
    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory
    • Argonne Natl Lab
    • Material Science Division, Argonne National Laboratory

  • Wai-Kwong Kwok

    • Argonne National Lab.
    • Materials Science Division, Argonne National laboratory
    • Argonne Natl Lab
    • Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne National Lab
    • Material Science Division, Argonne National Laboratory

  • Ulrich Welp

    • Materials Science Division, Argonne National laboratory
    • Argonne Natl Lab
    • Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory
    • Material Science Division, Argonne National Laboratory