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Strain engineering of superconducting properties in infinite-layer nickelates

ORAL

Abstract

The material frontier of infinite-layer nickelate thin films has rapidly expanded with a general trend of enhanced superconductivity with improved crystallinity1,2,3. The recent reports on the stabilization of infinite-layer nickelate thin film under more compressively straining substrate environment and the resultant enhancement of superconducting transition temperature1,2 call for an investigation of the degree to which strain plays a key role in superconductivity. A direct correlation between the higher superconducting transition temperature and the strain-driven modification of the intrinsic electronic structure2,4 remains an open question. In this talk, we will discuss our approach towards establishing strain as a tuning parameter of superconducting properties in the infinite-layer nickelates. In particular, we explore experimental techniques which can eliminate ambiguities coming from fluctuating crystallinity, thereby revealing the intrinsic response of the nickelate superconductivity upon strain.



1. K. Lee et al., arXiv:2203.02580 (2022).

2. X. Ren et al., arXiv: 2109.05761 (2021).

3. W. Sun et al., arXiv: 2204.13264 (2022).

4. N. N. Wang et al., Nat. Commun. 13, 4367 (2022).

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Presenters

  • Yonghun Lee

    Stanford University, Stanford University, SLAC National Accelerator Laboratory

Authors

  • Yonghun Lee

    Stanford University, Stanford University, SLAC National Accelerator Laboratory

  • Xin Wei

    Stanford University

  • Bai Yang Wang

    Stanford University, Stanford University, SLAC National Accelerator Laboratory

  • Yijun Yu

    Fudan Univ, Stanford University

  • Kyuho Lee

    Stanford University, Stanford University, SLAC National Accelerator Laboratory

  • Harold Hwang

    Stanford Univ, Stanford University