Identifying the effects of oxygen on the magnetism of WS2 nanosheets

被引：4

作者：

Sun, Yuanyuan ^{[1
]}

Zhang, Hongjun ^{[1
]}

Zhang, Kaiyu ^{[2
]}

Pan, Hongzhe ^{[1
]}

Zheng, Yongping ^{[3
]}

Feng, Qian ^{[3
]}

Tang, Nujiang ^{[4
]}

机构：

[1] Linyi Univ, Sch Phys & Elect Engn, Linyi 276000, Shandong, Peoples R China

[2] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

[3] Fujian Normal Univ, Coll Phys & Energy, Fujian Prov Key Lab Quantum Manipulat & New Energ, Fuzhou 350117, Peoples R China

[4] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Jiangsu Prov Key Lab Nanotechnol, Nanjing 210093, Peoples R China

来源：

NANOSCALE | 2022年 / 14卷 / 35期

基金：

中国国家自然科学基金;

关键词：

TRANSITION-METAL DICHALCOGENIDES; MOS2; SPIN;

D O I：

10.1039/d2nr03778e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, the microstructure and magnetic properties of the exfoliated and sulfurized WS2 nanosheets were researched to identify the effects of oxygen on magnetism. The exfoliated WS2 nanosheets were prepared by a liquid exfoliation method, and then the sulfurized WS2 nanosheets were obtained after sulfurization of the exfoliated WS2 nanosheets. The exfoliated WS2 nanosheets show paramagnetism, and contain 1T and 2H phases, sulfur vacancies and some oxygen. The sulfurized WS2 nanosheets with an intrinsic structure exhibit an ordered magnetic signature. A combination of detailed experimental research and first-principles calculation demonstrates that oxygen in the structure of WS2 nanosheets would not induce magnetic moments, which can even suppress the spin-polarized edge states. These results identified the effects of oxygen on the magnetism of WS2 nanosheets and would promote its application in spintronics.

引用

页码：12814 / 12822

页数：9

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