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Dramatically decreased magnetoresistance in non-stoichiometric WTe2 crystals | |
2016-05-27 | |
发表期刊 | SCIENTIFIC REPORTS |
ISSN | 2045-2322 |
卷号 | 6 |
发表状态 | 已发表 |
DOI | 10.1038/srep26903 |
摘要 | Recently, 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. |
收录类别 | SCI |
语种 | 英语 |
资助项目 | Graduate Innovation Fund of Nanjing University[2015CL11] |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
WOS记录号 | WOS:000376790000001 |
出版者 | NATURE PUBLISHING GROUP |
原始文献类型 | Article |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/1829 |
专题 | 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 |
通讯作者 | Yao, Shu-Hua; Chen, Y. B. |
作者单位 | 1.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 |
推荐引用方式 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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