Negative Te spin polarization responsible for ferromagnetic order in the doped topological insulator V-0.04(Sb1-xBix)(1.96)Te-3

doi:10.1103/PhysRevB.99.144413

	Negative Te spin polarization responsible for ferromagnetic order in the doped topological insulator V-0.04(Sb1-xBix)(1.96)Te-3
	Ye, M.1,2; Xu, T.1,2,3; Li, G.4 ; Qiao, S.1,2,4 ; Takeda, Y.5; Saitoh, Y.5; Zhu, S. -Y.6; Nurmamat, M.6; Sumida, K.6; Ishida, Y.7; Shin, S.7; Kimura, A.6
	2019-04-16
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	99 期号:14
发表状态	已发表
DOI	10.1103/PhysRevB.99.144413
摘要	Ferromagnetic topological insulators have emerged as a promising platform for quantum anomalous Hall (QAH) effect with a dissipationless edge transport. However, the observation of QAH effect has so far been restricted to extremely low temperatures. We investigate the microscopic origin of ferromagnetism coupled with topological insulators in vanadium-doped (Sb, Bi)(2)Te-3 employing the x-ray magnetic circular dichroism, angle-resolved two-photon photoemission spectroscopy, combined with first-principles calculations. We found a negative spin polarization, and thus an antiparallel magnetic moment at the Te site with respect to that of the vanadium dopants, which plays the key role in the ferromagnetic order. We ascribe it to the hybridization between Te p and V d majority spin states at the Fermi energy (E-F), being supported by a Zener-type p-d exchange interaction scenario. The substitution of Bi at the Sb site suppresses the bulk ferromagnetism by introducing extra electron carriers in the majority spin channel of Te p states that compensates the antiparallel magnetic moment on the Te site. Our findings reveal important clues to designing magnetic topological insulators with higher Curie temperature that work under ambient conditions.
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	JSPS Kakenhi[17H06138] ; JSPS Kakenhi[18H03683]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000464720300002
出版者	AMER PHYSICAL SOC
EI入藏号	20191906893343
EI主题词	Calculations ; Circular dichroism spectroscopy ; Dichroism ; Electric insulators ; Ferromagnetic materials ; Magnetic moments ; Photoelectron spectroscopy ; Quantum chemistry ; Quantum Hall effect ; Spin polarization ; Topological insulators ; Vanadium
EI分类号	Vanadium and Alloys:543.6 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Mathematics:921 ; Classical Physics; Quantum Theory; Relativity:931 ; High Energy Physics:932.1
WOS关键词	ABSORPTION-SPECTRA ; THIN-FILMS ; DICHROISM
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/34321
专题	物质科学与技术学院_特聘教授组_乔山组物质科学与技术学院_PI研究组_李刚组
通讯作者	Ye, M.
作者单位	1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 5.Japan Atom Energy Agcy, Mat Sci Res Ctr, Mikazuki, Hyogo 6795148, Japan 6.Hiroshima Univ, Grad Sch Sci, 1-3-1 Kagamiyama, Higashihiroshima 7398526, Japan 7.Univ Tokyo, ISSP, 5-1-5 Kashiwa Ha, Chiba 2778581, Japan
推荐引用方式 GB/T 7714	Ye, M.,Xu, T.,Li, G.,et al. Negative Te spin polarization responsible for ferromagnetic order in the doped topological insulator V-0.04(Sb1-xBix)(1.96)Te-3[J]. PHYSICAL REVIEW B,2019,99(14).
APA	Ye, M..,Xu, T..,Li, G..,Qiao, S..,Takeda, Y..,...&Kimura, A..(2019).Negative Te spin polarization responsible for ferromagnetic order in the doped topological insulator V-0.04(Sb1-xBix)(1.96)Te-3.PHYSICAL REVIEW B,99(14).
MLA	Ye, M.,et al."Negative Te spin polarization responsible for ferromagnetic order in the doped topological insulator V-0.04(Sb1-xBix)(1.96)Te-3".PHYSICAL REVIEW B 99.14(2019).