Pressure-induced superconductivity and phase transition in PbSe and PbTe  

作　　者：Yuyang Jiang Cuiying Pei Qi Wang Juefei Wu Lili Zhang Chao Xiong Yanpeng Qi 江宇阳;裴翠颖;王琦;吴珏霏;张丽丽;熊超;齐彦鹏(School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China;Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201203,China;Shanghai Key Laboratory of High-resolution Electron Microscopy,ShanghaiTech University,Shanghai 201210,China)

机构地区：[1]School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China [2]ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China [3]Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201203,China [4]Shanghai Key Laboratory of High-resolution Electron Microscopy,ShanghaiTech University,Shanghai 201210,China

出　　处：《Chinese Physics B》2024年第12期26-33,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.52272265);the National Key R&D Program of China(Grant No.2023YFA1607400);the support from Analytical Instrumentation Center(#SPSTAIC10112914),SPST,Shanghai Tech University。

摘　　要：TheⅣ-Ⅵsemiconducting chalcogenides are a large material family with distinct physical behavior.Here,we systematically investigate the effect of pressure on the electronic and crystal structures of PbSe and PbTe by combining high-pressure electrical transport and synchrotron x-ray diffraction(XRD)measurements.The resistivity of PbSe and PbTe changes dramatically under high pressure and a non-monotonic evolution of p(T)is observed.Both PbSe and PbTe are found to undergo semiconductor-metal transition upon compression and show superconductivity under higher pressure.The structural evolutions from the Fm3^(-)m to Pnma phase and then to the Pm3^(-)m phase in PbSe are verified by the x-ray diffraction.The present findings reveal the internal correlation between the structural evolution and the physical properties in lead chalcogenides.

关 键 词：Ⅳ-Ⅵ semiconductor high pressure SUPERCONDUCTIVITY crystal structure 

分 类 号：O511[理学—低温物理]