Anomalous magnetic property and broadband photodetection in ultrathin non-layered manganese selenide semiconductor  

作　　者：Ye Zhao Ruilong Yang Ke Yang Jiarui Dou Xiaoting Yang Jinzhong Guo Guowei Zhou Xiaohong Xu 

机构地区：[1]School of Chemistry and Materials Science,Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education,Shanxi Normal University,Taiyuan 030006,China [2]Research Institute of Materials Science,Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Techonology,Shanxi Normal University,Taiyuan 030006,China

出　　处：《Nano Research》2024年第9期8578-8584,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12174237,52002232,and 12304148);Fundamental Research Program of Shanxi Province(202303021221152).

摘　　要：Two-dimensional(2D)semiconductors with intrinsic ferromagnetism are highly desirable for potential applications in nextgeneration spintronic and optoelectronic devices.However,controllable synthesis of intrinsic 2D magnetic semiconductor on a substrate is still a challenging task.Herein,large-area 2D non-layered rock salt(α-phase)MnSe nanosheets were grown on mica substrates,with the thickness changing from 54.2 to 0.9 nm(one unit cell),by chemical vapour deposition.The X-ray diffraction,Raman spectroscopy,transmission electron microscopy,and X-ray photoelectron spectroscopy measurements confirmed that the resulting 2Dα-MnSe nanosheets were obtained as high-quality single crystals.The magnetic hysteresis loops and synchrotron X-ray measurements directly indicated the anomalous magnetic properties inα-MnSe nanosheets.Comprehensive analysis of the reasons for magnetic property revealed that the low-temperature phase transition,small number of stacking differences in crystals,and surface weak oxidation in(111)-orientedα-MnSe were the main mechanisms.Furthermore,α-MnSe nanosheets exhibited broadband photoresponse from 457 to 671 nm with an outstanding detectivity and responsivity behaviours.This study presents the detailed growth process of ultrathin 2D magnetic semiconductorα-MnSe,and its outstanding magnetic properties and broadband photodetection,which provide an excellent platform for magneto-optical and magneto-optoelectronic research.

关 键 词：two-dimensional material anomalous magnetism broadband photodetection α-phase MnSe non-layered crystal 

分 类 号：TN15[电子电信—物理电子学]