Weak localization effect in topological insulator micro flakes grown on insulating ferrimagnet BaFe12O19

doi:10.1038/srep21334

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院强磁场科学中心

	Weak localization effect in topological insulator micro flakes grown on insulating ferrimagnet BaFe12O19
	Zheng, Guolin 1,2; Wang, Ning 1,2; Yang, Jiyong 1,2; Wang, Weike 1,2; Du, Haifeng 1,2; Ning, Wei 1,2; Yang, Zhaorong 1,2,3; Lu, Hai-Zhou 4; Zhang, Yuheng 1,2,3; Tian, Mingliang 1,2,3,5
刊名	SCIENTIFIC REPORTS
	2016-02-19
卷号	6 期号:无页码:1-7
DOI	10.1038/srep21334
文献子类	Article
英文摘要	Many exotic physics anticipated in topological insulators require a gap to be opened for their topological surface states by breaking time reversal symmetry. The gap opening has been achieved by doping magnetic impurities, which however inevitably create extra carriers and disorder that undermine the electronic transport. In contrast, the proximity to a ferromagnetic/ferrimagnetic insulator may improve the device quality, thus promises a better way to open the gap while minimizing the side-effects. Here, we grow thin single-crystal Sb1.9Bi0.1Te3 micro flakes on insulating ferrimagnet BaFe12O19 by using the van der Waals epitaxy technique. The micro flakes show a negative magnetoresistance in weak perpendicular fields below 50 K, which can be quenched by increasing temperature. The signature implies the weak localization effect as its origin, which is absent in intrinsic topological insulators, unless a surface state gap is opened. The surface state gap is estimated to be 10 meV by using the theory of the gap-induced weak localization effect. These results indicate that the magnetic proximity effect may open the gap for the topological surface attached to BaM insulating ferrimagnet. This heterostructure may pave the way for the realization of new physical effects as well as the potential applications of spintronics devices.
WOS关键词	DIRAC-FERMION ; ANTILOCALIZATION ; NANORIBBONS ; SURFACE ; STATES
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000370556700001
资助机构	Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; Natural Science Foundation of China(11174294 ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; program of Users with Excellence ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; Hefei Science Center of CAS ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; CAS/SAFEA international partnership program for creative research teams of China ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11374302 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; 11574127 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1432251 ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209) ; U1332209)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/22294]
专题	合肥物质科学研究院_中科院强磁场科学中心
作者单位	1.Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China 4.South Univ Sci & Technol China, Dept Phys, Shenzhen, Peoples R China 5.Chinese Acad Sci, Hefei Sci Ctr, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Guolin,Wang, Ning,Yang, Jiyong,et al. Weak localization effect in topological insulator micro flakes grown on insulating ferrimagnet BaFe12O19[J]. SCIENTIFIC REPORTS,2016,6(无):1-7.
APA	Zheng, Guolin.,Wang, Ning.,Yang, Jiyong.,Wang, Weike.,Du, Haifeng.,...&Tian, Mingliang.(2016).Weak localization effect in topological insulator micro flakes grown on insulating ferrimagnet BaFe12O19.SCIENTIFIC REPORTS,6(无),1-7.
MLA	Zheng, Guolin,et al."Weak localization effect in topological insulator micro flakes grown on insulating ferrimagnet BaFe12O19".SCIENTIFIC REPORTS 6.无(2016):1-7.