Observation of an abnormally large bandgap in monolayer 1T′-WS2 grown on SrTiO3(001)

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成果类型：

期刊论文

作者：

Tian, Qichao;Wang, Ziyu;Zhao, Wei-Min;Xu, Yong-Jie;Liu, Gan;...

通讯作者：

Zhang, Y

作者机构：

[Liu, Gan; Wang, Can; Zhao, Wei-Min; Jin, Shaoen; Dou, Li-Guo; Zhang, Yi; Zong, Junyu; Chen, Wang; Yu, Fan; Xu, Yong-Jie; Tian, Qichao; Meng, Qinghao; Xi, Xiaoxiang; Li, Shao-Chun; Zhang, Y] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.

[Wang, Ziyu; Liu, Junwei] Hong Kong Univ Sci & Technol HKUST, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China.

[Wang, Li; Wang, Pengdong; Li, Fang-Sen] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Vacuum Interconnected NanoTech Workstat Nano X, Suzhou 215123, Peoples R China.

[Wang, Can; Zhang, Yi; Xi, Xiaoxiang; Li, Shao-Chun; Zhang, Y] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China.

[Wang, Can] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410114, Peoples R China.

通讯机构：

[Zhang, Y ] N

Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.

Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China.

语种：

英文

期刊：

Applied Physics Letters

ISSN：

0003-6951

年：

2023

卷：

123

期：

页码：

123104

DOI：

10.1063/5.0153787

基金类别：

This work was supported by the National Key Research and Development Program of China (Nos. 2018YFA0306800, 2021YFA1401500, and 2021YFA1400403), the National Natural Science Foundation of China (Nos. 92165205, 12022416, 11790311, and 12004172), the Hong Ko [2018YFA0306800, 2021YFA1401500, 2021YFA1400403]; National Key Research and Development Program of China [92165205, 12022416, 11790311, 12004172]; National Natural Science Foundation of China [ECS26302118, 16305019, N_HKUST626/18]; Hong Kong Research Grants Council [2021ZD0302803, 2021ZD0302800]; Innovation Program for Quantum Science and Technology of China; Program of High-Level Entrepreneurial and Innovative Talents Introduction of Jiangsu Province, China

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院系归属：

物理与电子科学学院

摘要：

The 1T′ structural phase of monolayer transition metal dichalcogenides MX2 (M = Mo, W; X = S, Se, Te) has attracted broad interest because of an exotic quantum spin Hall insulator state. Among them, the investigation on the electronic structures of the 1T′-WS2 monolayer is still lacking due to the difficulty in obtaining the 1T′-WS2 as a metastable phase. Here, we report the growth of 1T′ phase WS2 monolayer on the SrTiO3 (001) substrate using molecular beam epitaxy. Surprisingly, a large bandgap of 0.65 eV is revealed by angle-resolved pho...

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Observation of an abnormally large bandgap in monolayer 1T′-WS2 grown on SrTiO3(001)

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