Visualizing the evolution from Mott insulator to Anderson insulator in Ti-doped 1T-TaS2

doi:10.1038/s41535-021-00415-5

	Visualizing the evolution from Mott insulator to Anderson insulator in Ti-doped 1T-TaS2
	Zhang, Wenhao 4; Gao, Jingjing 3; Cheng, Li 2,8; Bu, Kunliang 4; Wu, Zongxiu 4; Fei, Ying 4; Zheng, Yuan 4; Wang, Li 1; Li, Fangsen 1; Luo, Xuan 3
刊名	NPJ QUANTUM MATERIALS
	2022-01-17
卷号	7
DOI	10.1038/s41535-021-00415-5
通讯作者	Liu, Zheng() ; Sun, Yuping(ypsun@issp.ac.cn) ; Yin, Yi(yiyin@zju.edu.cn)
英文摘要	The electronic evolution of doped Mott insulators has been extensively studied for decades in search of exotic physical phases. The proposed Mott insulator 1T-TaS2 provides an intriguing platform to study the electronic evolution via doping. Here we apply scanning tunneling microscopy (STM) to study the evolution in Ti-doped 1T-TaS2 at different doping levels. The doping Ti atom locally perturbs the electronic and spin state inside the doped star of David and induces a clover-shaped orbital texture at low-doping levels (x < 0.01). The insulator to metal transition occurs around a critical point x = 0.01, in which small metallic and large insulating domains coexist. The clover-shaped orbital texture emerges at a broader energy range, revealing a competition with the electron correlation. It transforms to a disorder-induced Anderson insulating behavior as doping increases. We directly visualize the trapped electrons in dI/dV conductance maps. The comprehensive study of the series of Ti-doped 1T-TaS2 deepens our understanding of the electronic state evolution in a doped strong-correlated system.
资助项目	National Key Research and Development Program[2019YFA0308602] ; National Key Research and Development Program[2016YFA0300404] ; Key Research and Development Program of Zhejiang Province, China[2021C01002] ; Vacuum Interconnected Nanotech Workstation (Nano-X)[B2004] ; Fundamental Research Funds for the Central Universities in China ; National Nature Science Foundation of China[NSFC-11774196] ; National Nature Science Foundation of China[NSFC-11674326] ; National Nature Science Foundation of China[NSFC-11874357] ; Tsinghua University Initiative Scientific Research Program ; National Natural Science Foundation of China ; Chinese Academy of Sciences[U1832141] ; Chinese Academy of Sciences[U1932217] ; Chinese Academy of Sciences[U2032215]
WOS关键词	CHARGE-DENSITY WAVES ; INITIO MOLECULAR-DYNAMICS ; TOTAL-ENERGY CALCULATIONS ; SUPERCONDUCTIVITY ; STATE ; TRANSITION ; LIQUID
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000743531200001
资助机构	National Key Research and Development Program ; Key Research and Development Program of Zhejiang Province, China ; Vacuum Interconnected Nanotech Workstation (Nano-X) ; Fundamental Research Funds for the Central Universities in China ; National Nature Science Foundation of China ; Tsinghua University Initiative Scientific Research Program ; National Natural Science Foundation of China ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127101]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Zheng; Sun, Yuping; Yin, Yi
作者单位	1.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Vacuum Interconnected Nanotech Workstn NanoX, Suzhou 215123, Peoples R China 2.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Geim Graphene Ctr, Shenzhen 518055, Peoples R China 3.HFIPS Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 4.Zhejiang Univ, Dept Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China 5.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China 6.HFIPS Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China 7.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China 8.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wenhao,Gao, Jingjing,Cheng, Li,et al. Visualizing the evolution from Mott insulator to Anderson insulator in Ti-doped 1T-TaS2[J]. NPJ QUANTUM MATERIALS,2022,7.
APA	Zhang, Wenhao.,Gao, Jingjing.,Cheng, Li.,Bu, Kunliang.,Wu, Zongxiu.,...&Yin, Yi.(2022).Visualizing the evolution from Mott insulator to Anderson insulator in Ti-doped 1T-TaS2.NPJ QUANTUM MATERIALS,7.
MLA	Zhang, Wenhao,et al."Visualizing the evolution from Mott insulator to Anderson insulator in Ti-doped 1T-TaS2".NPJ QUANTUM MATERIALS 7(2022).