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Chin. Phys. B, 2026, Vol. 35(5): 056401    DOI: 10.1088/1674-1056/ae40db
SPECIAL TOPIC — Structures and properties of materials under high pressure Prev   Next  

Pressure-tuned structure and superconductivity in 2H-NbSe2

Chen-Yi Li(李晨一)1, Zong-Lun Li(李宗伦)2, Hui Tian(田辉)3, Guang-Rui Gu(顾广瑞)4,†, Quan-Jun Li(李全军)1, and Xue-Ting Zhang(张雪婷)5,‡
1 State Key Laboratory of High Pressure and Superhard Materials, Jilin University, Changchun 130012, China;
2 School of Physical Science and Technology, Guangxi University, Nanning 530004, China;
3 School of Science, Shenyang Ligong University, Shenyang 110159, China;
4 Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
5 School of Medical Information Engineering, Shenyang Medical College, Shenyang 110034, China
Abstract  The structural and superconducting properties of 2H-NbSe$_{2}$ were systematically investigated under pressure up to 55.4 GPa using high-pressure electrical transport measurements, synchrotron radiation x-ray diffraction, and theoretical calculations. With increasing pressure, the enhanced interlayer coupling of 2H-NbSe$_{2}$ induces a structural transition from quasi-two dimensional to three dimensional. Meanwhile, accompanied by Fermi surface reconstruction, 2H-NbSe$_{2}$ exhibits a characteristic dome-shaped superconducting behavior, which provides valuable insights into the relationship between its superconducting properties and the structural transition.
Keywords:  2H-NbSe$_{2}$      superconductivity      high pressure      phase transition  
Received:  01 December 2025      Revised:  20 January 2026      Accepted manuscript online:  03 February 2026
PACS:  64.70.Nd (Structural transitions in nanoscale materials)  
  63.22.Np (Layered systems)  
  74.25.-q (Properties of superconductors)  
  74.62.Fj (Effects of pressure)  
Fund: This work was supported by the Doctoral Research Startup Fund of Liaoning Province (Grant No. 2025-BS-0867).
Corresponding Authors:  Guang-Rui Gu,E-mail:grgu@ybu.edu.cn;Xue-Ting Zhang,E-mail:syyxy_zxt@163.com     E-mail:  grgu@ybu.edu.cn;syyxy_zxt@163.com

Cite this article: 

Chen-Yi Li(李晨一), Zong-Lun Li(李宗伦), Hui Tian(田辉), Guang-Rui Gu(顾广瑞), Quan-Jun Li(李全军), and Xue-Ting Zhang(张雪婷) Pressure-tuned structure and superconductivity in 2H-NbSe2 2026 Chin. Phys. B 35 056401

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