高质量PtP_(2)晶体中的三维弱局域化和负磁阻效应  

Three-dimensional weak localization and negative magnetoresistance in high-quality PtP_(2)crystals

作　　者：程秋振 冼国裕 黄引 郭辉 潘禄禄 周厚博 王晶 吕森浩 申承民 林晓 陈海龙 李永峰 杨海涛 高鸿钧 Qiuzhen Cheng;Guoyu Xian;Yin Huang;Hui Guo;Lulu Pan;Houbo Zhou;Jing Wang;Senhao Lv;Chengmin Shen;Xiao Lin;Hailong Chen;Yongfeng Li;Haitao Yang;Hong-Jun Gao(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China;Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China [2]Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [4]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Science China Materials》2023年第6期2393-2399,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(61888102,22178384,21908245,and 22108301);the Ministry of Science and Technology of China(2018YFA0305800);the Chinese Academy of Sciences(ZDBS-SSW-WHC001 and XDB33030100);the Science Foundation of China University of Petroleum,Beijing(ZX20220079)。

摘　　要：近年来,含有五元环排列结构的PtP_(2)单晶和二维材料因具有丰富的物理和化学性能而得到广泛关注,有望应用于高性能电子和光电子器件.本文通过优化Pt和P的初始摩尔比,采用助溶剂法制备了高质量的PtP_(2)单晶,并在PtP_(2)单晶中首次发现了三维弱局域化和负磁阻效应.晶体结构、磁性和光谱测试表明,PtP_(2)单晶中的少量缺陷可抑制负磁阻效应和磁有序态.本文提出了合成高质量贵金属磷化物单晶的有效方法,为研究磷化物中多种关联电子态提供了新的平台.Pentagonal-ring-structured PtP_(2)bulk crystals and the two-dimensional(2D)PtP_(2)with rich theoretical physical and chemical properties have attracted considerable attention for the applications in high-performance electronic and optoelectronic devices.Here,high-quality PtP_(2)single crystals have been successfully prepared by using a tin flux method with the optimal molar ratios of Pt and P.3D weak localization effect and negative magnetoresistance(NMR)are observed in the high-quality PtP_(2)single crystals for the first time.Crystalline structure,magnetization,and optical spectral characterizations have demonstrated that the defects in PtP_(2)crystals can suppress the NMR effect and magnetic ordered states.These findings open up a way to synthesize the bulk and low-dimensional noble-metal-based phosphides of high quality and provide new platforms for studying the different correlated electronic states.

关 键 词：磁阻效应 排列结构 助溶剂法 光谱测试 磁有序 金属磷化物 光电子器件 晶体结构 

分 类 号：TQ138.26[化学工程—无机化工] O469[理学—凝聚态物理]