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<p>The cuprate superconductor La<sub>2−<i>x</i></sub>Ba<sub><i>x</i></sub>CuO<sub>4</sub> (LBCO) near <i>x</i>&#xa0;=&#xa0;0.125 is a striking example of intertwined electronic orders, where 3D superconductivity is anomalously suppressed, allowing spin and charge stripe order to develop. Understanding this interplay remains a key challenge in cuprates, highlighting the necessity of external tuning for deeper insight. While in-plane uniaxial stress enhances superconductivity and suppresses stripe order, the effects of <i>c</i>-axis compression remains largely unexplored. Here, we use muon spin rotation (<i>μ</i>SR) and AC susceptibility with an in situ piezoelectric stress device to investigate the spin-stripe order and superconductivity in LBCO-0.115 under <i>c</i>-axis compression. The measurements reveal a gradual suppression of the superconducting transition temperature (<i>T</i><sub>c</sub>) with increasing <i>c</i>-axis stress, in stark contrast to the strong enhancement observed under in-plane stress. We further show that while in-plane stress rapidly reduces both the magnetic volume fraction (<i>V</i><sub>m</sub>) and the spin-stripe ordering temperature (<i>T</i><sub>so</sub>), <i>c</i>-axis compression has no effect, with <i>V</i><sub>m</sub> and <i>T</i><sub>so</sub> exhibiting an almost unchanged behavior up to the highest applied stress of 0.21 GPa. These findings demonstrate a strong anisotropy in stress response.</p>

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Contrasting c-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La1.885Ba0.115CuO4

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月11日

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  • Shams Sohel Islam,
  • Vahid Sazgari,
  • Jennifer N. Graham,
  • Orion Gerguri,
  • Petr Král,
  • Ikuya Maetsu,
  • Hrishikesh Gopakumar,
  • Markus Müller,
  • Rajib Sarkar,
  • Vadim Grinenko,
  • Gediminas Simutis,
  • Toni Shiroka,
  • Rustem Khasanov,
  • Marc Janoschek,
  • John M. Tranquada,
  • Hans Henning Klauss,
  • Tadashi Adachi,
  • Hubertus Luetkens,
  • Zurab Guguchia

摘要

The cuprate superconductor La2−xBaxCuO4 (LBCO) near x = 0.125 is a striking example of intertwined electronic orders, where 3D superconductivity is anomalously suppressed, allowing spin and charge stripe order to develop. Understanding this interplay remains a key challenge in cuprates, highlighting the necessity of external tuning for deeper insight. While in-plane uniaxial stress enhances superconductivity and suppresses stripe order, the effects of c-axis compression remains largely unexplored. Here, we use muon spin rotation (μSR) and AC susceptibility with an in situ piezoelectric stress device to investigate the spin-stripe order and superconductivity in LBCO-0.115 under c-axis compression. The measurements reveal a gradual suppression of the superconducting transition temperature (Tc) with increasing c-axis stress, in stark contrast to the strong enhancement observed under in-plane stress. We further show that while in-plane stress rapidly reduces both the magnetic volume fraction (Vm) and the spin-stripe ordering temperature (Tso), c-axis compression has no effect, with Vm and Tso exhibiting an almost unchanged behavior up to the highest applied stress of 0.21 GPa. These findings demonstrate a strong anisotropy in stress response.