Tuning metal-insulator transition in delta-doped La:SrTiO3 superlattice by varying doping dimensionality and concentration

doi:10.7498/aps.70.20210830

	Tuning metal-insulator transition in delta-doped La:SrTiO3 superlattice by varying doping dimensionality and concentration
	Li Yun 1; Lu Wen-Jian 2
刊名	ACTA PHYSICA SINICA
	2021-11-20
卷号	70
关键词	two dimensional doping strong correlation effect metal-insulator transition
ISSN号	1000-3290
DOI	10.7498/aps.70.20210830
通讯作者	Li Yun(liyunphy@foxmail.com)
英文摘要	Electronic properties in delta-doped La:SrTiO3 superlattices varying with the doping dimensionality and concentration are systematically studied through using first-principles calculation. The superlattices consist of periodically repeated La-doped single SrTiO3 layers in SrTiO3 film, and the doping dimensionality can be tuned by varying the space of the neighboring doped layers. At 25% doping concentration, the spacing between SrTiO3 layers increases from 1 unit-cell layer to 5 unit-cell layers, i.e. the doping dimensionality changes three dimensions to two dimensions, the superlattice charater changes from metallic character into insulating character, and the charge sequence, spin sequence and orbital sequence are present in a localized state. This metal-insulator transition is ascribed to the stronger correlation effect in the two-dimensional electron system. With the two-dimensional doping concentration increasing to 50%, the correlation effect becomes weak and the system becomes metallic.
资助项目	Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China[-1098]
WOS关键词	NICKEL-OXIDE ; INTERFACES
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000732827600029
资助机构	Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126948]
专题	中国科学院合肥物质科学研究院
通讯作者	Li Yun
作者单位	1.Hanshan Normal Univ, Sch Phys & Elect Engn, Chaozhou 521041, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, HFIPS, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Li Yun,Lu Wen-Jian. Tuning metal-insulator transition in delta-doped La:SrTiO3 superlattice by varying doping dimensionality and concentration[J]. ACTA PHYSICA SINICA,2021,70.
APA	Li Yun,&Lu Wen-Jian.(2021).Tuning metal-insulator transition in delta-doped La:SrTiO3 superlattice by varying doping dimensionality and concentration.ACTA PHYSICA SINICA,70.
MLA	Li Yun,et al."Tuning metal-insulator transition in delta-doped La:SrTiO3 superlattice by varying doping dimensionality and concentration".ACTA PHYSICA SINICA 70(2021).