Mechanism of superconductivity improvement under high-pressure: X-ray scattering study in YBCO

ORAL

Abstract

The record setting Tc of superconductor is achieved under high-pressure in hydrogen sulfide, which shows applying pressure is a powerful technic to enhance Tc. Great efforts have also been made to understand the pressure effect in YBa2Cu3O6+x. However, the underlying mechanism of superconductivity enhancement under pressure is still illusive. We measured different order structures in ortho-III YBa2Cu3O6.73 (YBCO) using the x-ray scattering as a function of pressure. We found that the pressure modifies the quenched disorder state in YBCO. This finding could explain changes in the order features such as oxygen order and charge-density-wave (CDW) under compression, as well as the improvement of Tc. More details will be introduced in the presentation.

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Presenters

  • Hai Huang

    SLAC - Natl Accelerator Lab

Authors

  • Hai Huang

    SLAC - Natl Accelerator Lab

  • Hoyoung Jang

    SLAC - Natl Accelerator Lab, SLAC National Accelerator Laboratory

  • M. Fujita

    Institute for Materials Research, Tohoku University, Tohoku Univ, IMR, Tohoku University

  • Terukazu Nishizaki

    Department of Electrical Engineering, Kyushu Sangyo University, Kyushu Sangyo University

  • Yu Lin

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Jianlu Wang

    Shanghai Institute of Technical Physics of Chinese Academy of Science, National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences

  • Jianjun Ying

    Geophysical Laboratory, CIW, High Pressure Collaborative Access Team, Geophysical Laboratory,Carnegie Institution of Washington

  • Jesse Smith

    High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institute of Washington, High Pressure Collaborative Access Team, Geophysical Laboratory,Carnegie Institution of Washington

  • Curtis Kenney-Benson

    HPCAT, Carnegie Institute of Washington, Argonne National Lab, High Pressure Collaborative Access Team, Geophysical Laboratory,Carnegie Institution of Washington

  • Guoying Shen

    High Pressure Collaborative Access Team, Geophysical Laboratory,Carnegie Institution of Washington

  • Wendy Mao

    Geological Sciences, Stanford University

  • Chi-Chang Kao

    SLAC - Natl Accelerator Lab

  • Yijin Liu

    SLAC - Natl Accelerator Lab

  • Jun-Sik Lee

    SSRL/SLAC, SLAC - Natl Accelerator Lab, SLAC National Accelerator Laboratory