Exploring Lifshitz transition and superconductivity in 3R-NbS_(2) under pressure  

作　　者：Kun Chen Xindeng Lv Simin Li Yanping Huang Tian Cui 陈坤;吕心邓;李思敏;黄艳萍;崔田

机构地区：[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

出　　处：《Chinese Physics B》2025年第3期161-166,共6页中国物理B(英文版)

基　　金：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);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) 

分 类 号：O57[理学—粒子物理与原子核物理]