中国物理B ›› 2025, Vol. 34 ›› Issue (3): 37403-037403.doi: 10.1088/1674-1056/adacd2

所属专题: SPECIAL TOPIC — Structures and properties of materials under high pressure

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Exploring Lifshitz transition and superconductivity in 3R-NbS2 under pressure

Kun Chen(陈坤)1, Xindeng Lv(吕心邓)1, Simin Li(李思敏)1, Yanping Huang(黄艳萍)1,†, and Tian Cui(崔田)1,2   

  1. 1 Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China;
    2 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  • 收稿日期:2024-12-29 修回日期:2025-01-20 接受日期:2025-01-22 发布日期:2025-03-15
  • 通讯作者: Yanping Huang E-mail:huangyanping@nbu.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2022YFA1405500), the National Natural Science Foundation of China (Grant Nos. 52072188 and 12304072), Program for Science and Technology Innovation Team in Zhejiang (Grant No. 2021R01004), and the Natural Science Foundation of Ningbo (Grant No. 2021J121).

Exploring Lifshitz transition and superconductivity in 3R-NbS2 under pressure

Kun Chen(陈坤)1, Xindeng Lv(吕心邓)1, Simin Li(李思敏)1, Yanping Huang(黄艳萍)1,†, and Tian Cui(崔田)1,2   

  1. 1 Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China;
    2 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  • Received:2024-12-29 Revised:2025-01-20 Accepted:2025-01-22 Published:2025-03-15
  • Contact: Yanping Huang E-mail:huangyanping@nbu.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2022YFA1405500), the National Natural Science Foundation of China (Grant Nos. 52072188 and 12304072), Program for Science and Technology Innovation Team in Zhejiang (Grant No. 2021R01004), and the Natural Science Foundation of Ningbo (Grant No. 2021J121).

摘要: The interplay between electronic topological phase transitions and superconductivity in the field of condensed matter physics has consistently captivated researchers. Here we have succeeded in modulating the Lifshitz transition by pressure and realized superconductivity. At 25.7 GPa, superconductivity with a transition temperature of 1.9 K has been observed in 3R-NbS$_{2}$. The Hall coefficient changes from negative to positive at 14 GPa, indicating a Lifshitz transition in 3R-NbS$_{2}$, and the carrier concentration continues to increase with increasing pressure. X-ray diffraction results indicate that the appearance of superconductivity cannot be attributable to structural transitions. Based on theoretical calculations, the emergence of a new band is attributed to the Lifshitz transition and the new band coincides with the Fermi surface at the pressure of 30 GPa. These findings provide new insights into the relationship between the Lifshitz transition and superconductivity.

关键词: high pressure, superconductivity, Lifshitz transition, 3R-NbS$_{2}$

Abstract: The interplay between electronic topological phase transitions and superconductivity in the field of condensed matter physics has consistently captivated researchers. Here we have succeeded in modulating the Lifshitz transition by pressure and realized superconductivity. At 25.7 GPa, superconductivity with a transition temperature of 1.9 K has been observed in 3R-NbS$_{2}$. The Hall coefficient changes from negative to positive at 14 GPa, indicating a Lifshitz transition in 3R-NbS$_{2}$, and the carrier concentration continues to increase with increasing pressure. X-ray diffraction results indicate that the appearance of superconductivity cannot be attributable to structural transitions. Based on theoretical calculations, the emergence of a new band is attributed to the Lifshitz transition and the new band coincides with the Fermi surface at the pressure of 30 GPa. These findings provide new insights into the relationship between the Lifshitz transition and superconductivity.

Key words: high pressure, superconductivity, Lifshitz transition, 3R-NbS$_{2}$

中图分类号:  (Superconducting materials other than cuprates)

  • 74.70.-b
07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells) 91.60.Gf (High-pressure behavior) 71.18.+y (Fermi surface: calculations and measurements; effective mass, g factor)