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

文献类型：期刊论文

作者Zhang, Wenhao8; Gao, Jingjing7; Cheng, Li5,6; Bu, Kunliang8; Wu, Zongxiu8; Fei, Ying8; Zheng, Yuan8; Wang, Li4; Li, Fangsen4; Luo, Xuan7
刊名NPJ QUANTUM MATERIALS
出版日期2022-01-17
卷号7
DOI10.1038/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.
WOS关键词CHARGE-DENSITY WAVES ; INITIO MOLECULAR-DYNAMICS ; TOTAL-ENERGY CALCULATIONS ; SUPERCONDUCTIVITY ; STATE ; TRANSITION ; LIQUID
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
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.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
2.HFIPS Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China
3.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Vacuum Interconnected Nanotech Workstn NanoX, Suzhou 215123, Peoples R China
5.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
6.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Geim Graphene Ctr, Shenzhen 518055, Peoples R China
7.HFIPS Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
8.Zhejiang Univ, Dept Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, 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).

入库方式： OAI收割

来源：合肥物质科学研究院

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