Dramatically decreased magnetoresistance in non-stoichiometric WTe2 crystals
Lv, Yang-Yang1,2; Zhang, Bin-Bin1,2; Li, Xiao1,2; Pang, Bin1,2; Zhang, Fan1,2; Lin, Da-Jun1,2; Zhou, Jian1,2; Yao, Shu-Hua1,2; Chen, Y. B.1,3; Zhang, Shan-Tao1,2; Lu, Minghui1,2; Liu, Zhongkai4; Chen, Yulin4,5,6; Chen, Yan-Feng1,2,7
2016-05-27
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume6
Status已发表
DOI10.1038/srep26903
AbstractRecently, the layered semimetal WTe2 has attracted renewed interest owing to the observation of a non-saturating and giant positive magnetoresistance (similar to 10(5)%), which can be useful for magnetic memory and spintronic devices. However, the underlying mechanisms of the giant magnetoresistance are still under hot debate. Herein, we grew the stoichiometric and non-stoichiometric WTe2 crystals to test the robustness of giant magnetoresistance. The stoichiometric WTe2 crystals have magnetoresistance as large as 3100% at 2 K and 9-Tesla magnetic field. However, only 71% and 13% magnetoresistance in the most non-stoichiometry (WTe1.80) and the highest Mo isovalent substitution samples (W0.7Mo0.3Te2) are observed, respectively. Analysis of the magnetic-field dependent magnetoresistance of non-stoichiometric WTe2 crystals substantiates that both the large electron-hole concentration asymmetry and decreased carrier mobility, induced by non-stoichiometry, synergistically lead to the decreased magnetoresistance. This work sheds more light on the origin of giant magnetoresistance observed in WTe2.
Indexed BySCI
Language英语
Funding ProjectGraduate Innovation Fund of Nanjing University[2015CL11]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000376790000001
PublisherNATURE PUBLISHING GROUP
Original Document TypeArticle
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/1829
Collection物质科学与技术学院_PI研究组_柳仲楷组
物质科学与技术学院_特聘教授组_陈宇林
Corresponding AuthorYao, Shu-Hua; Chen, Y. B.
Affiliation1.Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China
3.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China
5.Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China
6.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
7.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Lv, Yang-Yang,Zhang, Bin-Bin,Li, Xiao,et al. Dramatically decreased magnetoresistance in non-stoichiometric WTe2 crystals[J]. SCIENTIFIC REPORTS,2016,6.
APA Lv, Yang-Yang.,Zhang, Bin-Bin.,Li, Xiao.,Pang, Bin.,Zhang, Fan.,...&Chen, Yan-Feng.(2016).Dramatically decreased magnetoresistance in non-stoichiometric WTe2 crystals.SCIENTIFIC REPORTS,6.
MLA Lv, Yang-Yang,et al."Dramatically decreased magnetoresistance in non-stoichiometric WTe2 crystals".SCIENTIFIC REPORTS 6(2016).
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