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Probing Defect-Induced Midgap States in MoS2 Through Graphene-MoS2 Heterostructures
Han, Yu1; Wu, Zefei1; Xu, Shuigang1; Chen, Xiaolong1; Wang, Lin1; Wang, Yang1; Xiong, Wei1; Han, Tianyi1; Ye, Weiguang1; Lin, Jiangxiazi1; Cai, Yuan1; Ho, Kin Ming1; He, Yuheng1; Su, Dangsheng2; Wang, Ning1
通讯作者Han, Yu()
2015-05-22
发表期刊ADVANCED MATERIALS INTERFACES
ISSN2196-7350
卷号2期号:8页码:6
摘要Crystalline defects in MoS2 may induce midgap states, resulting in low carrier mobility. These midgap states are usually difficult to probe by conventional transport measurement. The quantum capacitance of single-layer graphene is sensitive to defect-induced states near the Dirac point, at which the density of states is extremely low. It is reported that the hexagonal-boron nitride/graphene/MoS2 sandwich structure facilitates the exploration of the properties of those midgap states in MoS2. Comparative results of the quantum capacitance of pristine graphene indicate the presence of several midgap states with distinct features. Some of these states donate electrons while some states lead to localization of electrons. It is believed that these midgap states originate from intrinsic point defects such as sulfur vacancies, which have a significant impact on the property of the MoS2/graphene interface. They are responsible for the contact problems of metal/MoS2 interfaces.
关键词defects graphene heterostructure midgap states MoS2 quantum capacitance
资助者Research Grants Council of Hong Kong ; Research Grants Council of Hong Kong (HKUST-SRFI) ; Raith-HKUST Nanotechnology Laboratory
DOI10.1002/admi.201500064
收录类别SCI
语种英语
资助项目Research Grants Council of Hong Kong[N_HKUST613/12] ; Research Grants Council of Hong Kong[604112] ; Research Grants Council of Hong Kong[HKU9/CRF/13G] ; Research Grants Council of Hong Kong[HKUST9/CRF/08] ; Research Grants Council of Hong Kong (HKUST-SRFI) ; Raith-HKUST Nanotechnology Laboratory[SEG_HKUST08]
WOS研究方向Chemistry ; Materials Science
WOS类目Chemistry, Multidisciplinary ; Materials Science, Multidisciplinary
WOS记录号WOS:000355234600006
出版者WILEY-BLACKWELL
引用统计
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/81096
通讯作者Han, Yu
作者单位1.Hong Kong Univ Sci Technol, William Mong Inst Nano Sci Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
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GB/T 7714
Han, Yu,Wu, Zefei,Xu, Shuigang,et al. Probing Defect-Induced Midgap States in MoS2 Through Graphene-MoS2 Heterostructures[J]. ADVANCED MATERIALS INTERFACES,2015,2(8):6.
APA Han, Yu.,Wu, Zefei.,Xu, Shuigang.,Chen, Xiaolong.,Wang, Lin.,...&Wang, Ning.(2015).Probing Defect-Induced Midgap States in MoS2 Through Graphene-MoS2 Heterostructures.ADVANCED MATERIALS INTERFACES,2(8),6.
MLA Han, Yu,et al."Probing Defect-Induced Midgap States in MoS2 Through Graphene-MoS2 Heterostructures".ADVANCED MATERIALS INTERFACES 2.8(2015):6.
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