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.

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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