Atomic scale electronic structure of the ferromagnetic semiconductor Cr2Ge2Te6

作     者：Zhenqi Hao Haiwei Li Shunhong Zhang Xintong Li Gaoting Lin Xuan Luo Yuping Sun Zheng Liu Yayu Wang 

作者机构：State Key Laboratory of Low Dimensional Quantum PhysicsDepartment of PhysicsTsinghua UniversityBeijing 100084China Institute for Advanced StudyTsinghua UniversityBeijing 100084China Key Laboratory of Materials PhysicsInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China University of Sdence and Technology of ChinaHefei 230026China e High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China High Magnetic Field LaboratoryChinese Academy of SdencesHefei 230031China Collaborative Innovation Centre of Advanced MicrostructuresNanjing UniversityNanjing 210093Chinag Collaborative Innovation Center of Quantum MatterBeijing 100084China 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2018年第63卷第13期

页      面：825-830页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the Basic Science Center Project of NSFC(51788104) the MOST of China(2015CB921000) the support from Tsinghua University Initiative Scientific Research Program and NSFC(11774196) S.H.Z.is supported by the National Postdoctoral Program for Innovative Talents of China(BX201600091) the China Postdoctoral Science Foundation(2017M610858) the support of the National Key Research and Development Program(2016YFA0300404) NSFC Grant(11674326) the Joint Funds of NSFC and the Chinese Academy of Sciences’Large-Scale Scientific Facility(U1432139) supported in part by the Beijing Advanced Innovation Center for Future Chip(ICFC) 

主　　题：Ferromagnetic semiconductor Electronic structure Scanning tunneling microscopy Density functional theory 

摘      要：Cr_2Ge_2Te_6is an intrinsic ferromagnetic semiconductor with van der Waals type layered structure,thus represents a promising material for novel electronic and spintronic *** we combine scanning tunneling microscopy and first-principles calculations to investigate the electronic structure of Cr_2Ge_2Te_*** spectroscopy reveals a surprising large energy level shift and change of energy gap size across the ferromagnetic to paramagnetic phase transition,as well as a peculiar double-peak electronic state on the Cr-site *** features can be quantitatively explained by density functional theory calculations,which uncover a close relationship between the electronic structure and magnetic *** findings shed important new lights on the microscopic electronic structure and origin of magnetic order in Cr_2Ge_2Te_6.