来源 Zotero
作者 Yinghao Zhu, Di Peng, Enkang Zhang, Bingying Pan, Xu Chen, Lixing Chen, Huifen Ren, Feiyang Liu, Yiqing Hao, Nana Li, Zhenfang Xing, Fujun Lan, Jiyuan Han, Junjie Wang, Donghan Jia, Hongliang Wo, Yiqing Gu, Yimeng Gu, Li Ji, Wenbin Wang, Huiyang Gou, Yao Shen, Tianping Ying, Xiaolong Chen, Wenge Yang, Huibo Cao, Changlin Zheng, Qiaoshi Zeng, Jian-gang Guo, Jun Zhao
arXiv / 出版方 https://www.nature.com/articles/s41586-024-07553-3
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发布日期 2024-07-18
研究范式 未知
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摘要

Superconductivity in pressurized trilayer La4Ni3O10−δ single crystals

材料

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方法

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关键词

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亮点

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结论

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主要论断

  • Bulk superconductivity is observed in pressurized trilayer La4Ni3O10-δ single crystals with Tc up to ≈30 K at 69 GPa.
    • 证据: Zero resistance above 43 GPa,DC susceptibility shows large diamagnetic response with volume fraction up to 86%
  • Superconductivity emerges upon suppression of the spin-charge order (TN ≈136 K at ambient pressure).
    • 证据: Resistance measurements show the TN anomaly is suppressed with pressure, and a SC drop appears at higher pressures,Phase diagram shows SC dome after suppression of magnetic order
  • The normal state is a strange metal with linear temperature resistance up to 300 K.
    • 证据: Resistance above Tc follows T-linear dependence over a wide range

研究流程

  • single_crystal_growth — High-quality single crystals with minor oxygen deficiency.
    • 材料: La4Ni3O10-δ polycrystalline rods
    • 方法: High-pressure floating-zone (SciDre HKZ); Oxygen pressure 18-22 bar; Xe lamp 5 kW
    • 观察: Black shiny crystals, typical size ≈4 mm; HAADF and iDPC imaging confirm trilayer structure; Single-crystal refinement: La4Ni3O9.96(4), P21/a space group
  • high_pressure_resistance — Superconductivity emerges with Tc up to 30 K upon suppression of spin-charge order.
    • 材料: La4Ni3O10-δ single crystal
    • 方法: Four-probe in diamond anvil cell (helium or KBr medium); PPMS
    • 观察: At low P, spin-order peak at TN ≈136 K suppressed; Above 15.5 GPa, resistance drop appears; zero resistance above 43 GPa; Tc increases to ≈30 K at 69 GPa; Normal state shows T-linear resistance (strange metal)
  • dc_susceptibility_under_pressure — Bulk superconductivity with large volume fraction.
    • 材料: La4Ni3O10-δ single crystal
    • 方法: Miniature DAC in MPMS3, nitrogen medium
    • 观察: Clear diamagnetic response at Tc; Estimated superconducting volume fraction up to 86%
  • high_pressure_synchrotron_xrd — Structural transition enhances interlayer coupling.
    • 材料: Powdered La4Ni3O10-δ single crystals
    • 方法: Synchrotron XRD at SSRF (beamline 15U1); Helium DAC; Rietveld refinement
    • 观察: Structural transition from monoclinic P21/a to tetragonal I4/mmm above 13-15 GPa; Ni-O-Ni angle changes from ≈165.6° to 180°