Freestanding infinite-layer nickelate membranes

ORAL

Abstract

Five years since the discovery of superconducting infinite-layer nickelate thin films, a superconducting bulk counterpart remains elusive. On the other hand, the synergy of refined synthesis techniques and compressive epitaxial strain geometry has continued to lift the upper bound on the superconducting transition temperature1,2. A natural question is then to what extent strain gives rise to superconductivity in infinite-layer nickelates. Through epitaxial strain engineering, achieving uniform control over varying levels of disorder across different samples remains challenging. To this end, we have fabricated freestanding infinite-layer nickelate membranes with comparable structural, transport, and superconducting properties as those of optimized thin films3. We will discuss our approach towards probing and manipulating superconducting properties in infinite-layer nickelates without the limitation of substrate constraints.

1. K. Lee et al., Nature 619, 288-292 (2023).

2. L. E. Chow et al., arXiv: 2410.00144 (2024).

3. Y. Lee et al. arXiv: 2402.05104 (2024).

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Publication: Y. Lee et al. arXiv: 2402.05104 (2024).

Presenters

  • Yonghun Lee

    • Stanford University

Authors

  • Yonghun Lee

    • Stanford University

  • Xin Wei

    • Stanford University

  • Yijun Yu

    • Stanford University

  • Bai Yang Wang

    • SLAC National Accelerator Laboratory
    • Stanford University

  • Lopa Bhatt

    • Cornell University

  • Berit Hansen Goodge

    • Cornell University

  • David A Muller

    • Cornell University

  • Lena F Kourkoutis

    • Cornell University

  • Harold Y Hwang

    • Stanford University