Source zotero
Authors Qing Li, Ying-Jie Zhang, Zhe-Ning Xiang, Yuhang Zhang, Xiyu Zhu, Hai-Hu Wen
arXiv / Publisher https://doi.org/10.1088/0256-307X/41/1/017401
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Published 2024-01-01
Research paradigm Experimental
Sample form Unknown

Summary

The discovery of high-temperature superconductivity near 80 K in bilayer nickelate La3Ni2O7 under high pressures has renewed the exploration of superconducting nickelate in bulk materials. The extension of superconductivity in other nickelates in a broader family is also essential. Here, we report the experimental observation of superconducting signature in trilayer nickelate La4Ni3O10 under high pressures. By using a modified sol-gel method and post-annealing treatment under high oxygen pressure, we successfully obtained polycrystalline La4Ni3O10 samples with different transport behaviors at ambient pressure. Then we performed high-pressure electrical resistance measurements on these samples in a diamond-anvil-cell apparatus. Surprisingly, the signature of possible superconducting transition with a maximum transition temperature (T c) of about 20 K under high pressures is observed, as evidenced by a clear drop of resistance and the suppression of resistance drops under magnetic fields. Although the resistance drop is sample-dependent and relatively small, it appears in all of our measured samples. We argue that the observed superconducting signal is most likely to originate from the main phase of La4Ni3O10. Our findings will motivate the exploration of superconductivity in a broader family of nickelates and shed light on the understanding of the underlying mechanisms of high-T c superconductivity in nickelates.

Materials

Methods

  • Modified sol-gel method
  • Post-annealing under high oxygen pressure
  • High-pressure electrical resistance measurements in diamond-anvil-cell

Keywords

  • trilayer nickelate
  • superconducting signature
  • tc about 20 k

Highlights

  • First experimental observation of superconducting signature in trilayer nickelate La4Ni3O10.
  • Motivates exploration of superconductivity in broader nickelate family.

Conclusions

  • Signature of possible superconducting transition with maximum Tc about 20 K is observed under high pressures.
  • Resistance drops are suppressed under magnetic fields.

Main claims

Not available in this batch.

Workflow

Not available in this batch.