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<p>The discovery of superconductivity in pressurized Ruddlesden-Popper (RP) nickelates has provided new perspectives on the mechanism of high-temperature superconductivity. Up to now, most experiments concentrated on the lanthanum-related RP phase, so the discovery of new superconducting RP nickelates is highly desirable to reveal their generality. Here we report the observation of superconductivity in Pr<sub>4</sub>Ni<sub>3</sub>O<sub>10</sub> single crystals above 10 GPa, achieving a maximum <i>T</i><sub>c</sub> of 39 K without saturation, significantly exceeding the value of 25–30 K of La<sub>4</sub>Ni<sub>3</sub>O<sub>10</sub>. Ultrasensitive magnetic susceptibility measurements under high pressure indicate bulk superconductivity with appreciable superconducting volume fractions. Unlike La<sub>4</sub>Ni<sub>3</sub>O<sub>10</sub>, the electronic structure of the high-pressure phase of Pr<sub>4</sub>Ni<sub>3</sub>O<sub>10</sub> exhibits a dramatic metallization of the σ-bonding band consisting of three <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(d_{z^{2}}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <msub> <mi>d</mi> <mrow> <msup> <mi>z</mi> <mrow> <mn>2</mn> </mrow> </msup> </mrow> </msub> </math></EquationSource> </InlineEquation> orbitals and van Hove singularity of coupled bands of <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(d_{x^{2}-y^{2}}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <msub> <mi>d</mi> <mrow> <msup> <mi>x</mi> <mrow> <mn>2</mn> </mrow> </msup> <mo>−</mo> <msup> <mi>y</mi> <mrow> <mn>2</mn> </mrow> </msup> </mrow> </msub> </math></EquationSource> </InlineEquation> orbitals near the Fermi level, similar to La<sub>3</sub>Ni<sub>2</sub>O<sub>7</sub>. These findings reveal some generic features of both crystal and electronic structures for high-temperature superconductivity in nickelates and multi-layer cuprates.</p>

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Unveiling pressurized bulk superconductivity in a trilayer nickelate Pr4Ni3O10 single crystal

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Cuiying Pei,
  • Mingxin Zhang,
  • Di Peng,
  • Yang Shen,
  • Shangxiong Huangfu,
  • Shihao Zhu,
  • Qi Wang,
  • Juefei Wu,
  • Junjie Wang,
  • Zhenfang Xing,
  • Lili Zhang,
  • Hirokazu Kadobayashi,
  • Saori I. Kawaguchi,
  • Yulin Chen,
  • Jinkui Zhao,
  • Wenge Yang,
  • Hongli Suo,
  • Hanjie Guo,
  • Qiaoshi Zeng,
  • Guang-Ming Zhang,
  • Yanpeng Qi

摘要

The discovery of superconductivity in pressurized Ruddlesden-Popper (RP) nickelates has provided new perspectives on the mechanism of high-temperature superconductivity. Up to now, most experiments concentrated on the lanthanum-related RP phase, so the discovery of new superconducting RP nickelates is highly desirable to reveal their generality. Here we report the observation of superconductivity in Pr4Ni3O10 single crystals above 10 GPa, achieving a maximum Tc of 39 K without saturation, significantly exceeding the value of 25–30 K of La4Ni3O10. Ultrasensitive magnetic susceptibility measurements under high pressure indicate bulk superconductivity with appreciable superconducting volume fractions. Unlike La4Ni3O10, the electronic structure of the high-pressure phase of Pr4Ni3O10 exhibits a dramatic metallization of the σ-bonding band consisting of three \(d_{z^{2}}\) d z 2 orbitals and van Hove singularity of coupled bands of \(d_{x^{2}-y^{2}}\) d x 2 − y 2 orbitals near the Fermi level, similar to La3Ni2O7. These findings reveal some generic features of both crystal and electronic structures for high-temperature superconductivity in nickelates and multi-layer cuprates.