Enhancement of magnetism by structural phase transition in MoS2

被引：103
|
作者：
Yan, Shiming [1 ,2 ]
Qiao, Wen [1 ]
He, Xueming [1 ]
Guo, Xiaobing [3 ]
Xi, Li [3 ]
Zhong, Wei [1 ]
Du, Youwei [1 ]
机构：
[1] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[2] Henan Univ Technol, Coll Sci, Zhengzhou 450001, Peoples R China
[3] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 01期
基金：
中国国家自然科学基金;
关键词：
GRAPHENE; PHOTOLUMINESCENCE; MONOLAYER;
D O I：
10.1063/1.4905656
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetic properties of 2H phase of MoS2 (2H-MoS2) and 1T phase of MoS2 (1T-MoS2) were investigated both experimentally and theoretically. Lithium (Li) intercalation method was used to prepare single-layer MoS2 sheets. It was found that pristine MoS2 (2H-MoS2) exhibited weak dia-magnetism. After exfoliating by Li intercalation, the crystal structure transformed from 2H to 1T phase, and the magnetism was significantly enhanced from diamagnetism to paramagnetism accordingly. With further annealing in argon atmosphere, the 2H phase recovered gradually from 1T phase, and the magnetism decreased correspondingly. Using crystal field theory and combining the results of first principle calculation, we conclude that the enhanced magnetism can be attributed to the Mo atoms of 1T-MoS2. (C) 2015 AIP Publishing LLC.
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页数：5
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