Pressure evolution of crystal structure, magnetism, and electrical resistivity in bilayer and trilayer nickelates

ORAL

Abstract

The recent discovery of superconductivity in bilayer Ruddlesden-Popper nickelate La3Ni2O7, with TC up to 80 K at pressure above 14 GPa, has generated significant interest in exploring high temperature superconductivity in nickelates. However, considering the structure ambiguity of high pressure phase and the crucial role of the structure-property relationship in understanding the mechanism behind high TC superconductivity, in this study, we report the high pressure synthesis of bilayer and trilayer Ruddlesden-Popper nickelates, La3Ni2O7 and La4Ni3O10, at 20 GPa and 1400 °C. Single crystal X-ray diffraction results reveal lattice compression with subtle structure variations compared to ambient pressure. The evolution of this structural feature under pressure is further explored through in situ high pressure laboratory X-ray single crystal diffraction. We will present our investigation, including the magnetization and electrical resistivity measurements.

*The work at Michigan State University was primarily supported by U.S. DOE-BES under Contract DE-SC0023648. The work in Ames National Laboratory was supported by U.S. DOE-BES under Contract No. DE-AC02-07CH1135. The work at Princeton University was supported by U.S. DOE-BES under Contract DE-FG02-98ER45706. J.L. acknowledges support by NSF grant EAR1763189.

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Presenters

  • Haozhe Wang

    • Michigan State University

Authors

  • Haozhe Wang

    • Michigan State University

  • Mingyu Xu

    • Michigan State University
    • Iowa State University

  • Xinglong Chen

    • Argonne National Laboratory

  • Hong Zheng

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

  • shuyuan huyan

    • Ames Laboratory
    • Ames National Laboratory

  • Danrui Ni

    • Princeton University

  • Ran Gao

    • Princeton Univeristy

  • Sergey L Bud'ko

    • Iowa State University
    • Ames National Laboratory/Iowa State University

  • Jie Li

    • Univeristy of Michigan

  • Paul C Canfield

    • Iowa State University
    • Ames National Laboratory/Iowa State University

  • Robert J Cava

    • Princeton University

  • J. F Mitchell

    • Argonne National Laboratory

  • Weiwei Xie

    • Michigan State University