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<p>We have systematically studied the structural and electronic properties of a topological material NbNiTe<sub>5</sub> under high pressure. The evolution of the normal state resistance shows a non-monotonic trend from 0.7 to 5.1 GPa, in accordance with the second-order transition along the inter-layer direction observed in X-ray diffraction and Raman spectra. At around 10 GPa, the sample starts amorphization, which is concurrent with the emergence of superconductivity. Upon further compression, the structural disorder enhances and the superconducting transition becomes clearer, suggesting that the superconductivity is modulated by the degree of disorder in NbNiTe<sub>5</sub> under high pressure. Within 45.7 GPa, the superconducting transition temperature (<i>T</i><sub>c</sub>) slowly rises from 0.6 K at 9.5 GPa to 1.4 K at 45.7 GPa. Our findings extend the family of transition metal chalcogenide superconductors and shed new light on understanding superconductivity in disordered systems.</p>

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Pressure-induced concurrent amorphization and superconductivity in topological material NbNiTe5

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Lingxiao Zhao,
  • Yi Zhao,
  • Bangshuai Zhu,
  • Qi Wang,
  • Cuiying Pei,
  • Juefei Wu,
  • Jin-Ke Bao,
  • Wen-He Jiao,
  • Yanpeng Qi

摘要

We have systematically studied the structural and electronic properties of a topological material NbNiTe5 under high pressure. The evolution of the normal state resistance shows a non-monotonic trend from 0.7 to 5.1 GPa, in accordance with the second-order transition along the inter-layer direction observed in X-ray diffraction and Raman spectra. At around 10 GPa, the sample starts amorphization, which is concurrent with the emergence of superconductivity. Upon further compression, the structural disorder enhances and the superconducting transition becomes clearer, suggesting that the superconductivity is modulated by the degree of disorder in NbNiTe5 under high pressure. Within 45.7 GPa, the superconducting transition temperature (Tc) slowly rises from 0.6 K at 9.5 GPa to 1.4 K at 45.7 GPa. Our findings extend the family of transition metal chalcogenide superconductors and shed new light on understanding superconductivity in disordered systems.