Pressure induced insulator to metal transition in quantum spin liquid candidate NaYbS_(2)  

作　　者：贾雅婷 龚春生 李芷文 刘以轩 赵建发 王哲 雷和畅 于润泽 靳常青 Yating Jia;Chunsheng Gong;Zhiwen Li;Yixuan Liu;Jianfa Zhao;Zhe Wang;Hechang Lei;Runze Yu;Changqing Jin(Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Xi'an Modern Chemistry Research Institute,Xi'an 710065,China;Laboratory for Neutron Scattering,and Beijing Key Laboratory of Optoelectronic Functional Materials MicroNano Devices,Department of Physics,Renmin University of China,Beijing 100872,China;College of Chemistry and Material Science,Hebei Normal University,Shijiazhuang 050024,China;Center for High-Pressure Science and Technology Advanced Research,Beijing 100094,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Xi'an Modern Chemistry Research Institute,Xi'an 710065,China [3]Laboratory for Neutron Scattering,and Beijing Key Laboratory of Optoelectronic Functional Materials MicroNano Devices,Department of Physics,Renmin University of China,Beijing 100872,China [4]College of Chemistry and Material Science,Hebei Normal University,Shijiazhuang 050024,China [5]Center for High-Pressure Science and Technology Advanced Research,Beijing 100094,China [6]University of Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics B》2023年第9期369-372,共4页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant Nos.2018YFA0305700,2018YFE0202600,and 2022YFA1403800);the Beijing Natural Science Foundation(Grant Nos.2202059 and Z200005);the National Natural Science Foundation of China(Grant Nos.22171283 and 12274459);the Hebei Natural Science Foundation(Grant No.B2020205040);the Beijing National Laboratory for Condensed Matter Physics。

摘　　要：Pressure induced insulator to metal transition followed by the appearance of superconductivity has been observed recently in inorganic quantum spin liquid candidate NaYbSe_(2).In this paper,we study the properties of isostructural compound NaYbS_(2)under pressure.It is found that the resistance of Na YbS_(2)single crystal exhibits an insulating state below 82.9 GPa,but with a drop of more than six orders of magnitude at room temperature.Then a minimum of resistance is observed at about 100.1 GPa and it moves to lower temperature with further compression.Finally,a metallic state in the whole temperature range is observed at about 130.3 GPa accompanied by a non-Fermi liquid behavior below 100 K.The insulator to metal transition,non-monotonic resistance feature and non-Fermi liquid behavior of NaYbS_(2)under pressure are similar to those of NaYbSe_(2),suggesting that these phenomena might be the universal properties in NaLnCh_(2)(Ln=rare earth,Ch=O,S,Se)system.

关 键 词：high pressure quantum spin liquid insulator to metal transition NaYbS_(2) 

分 类 号：O469[理学—凝聚态物理]