Discovery of Superconductivity in 2M WS2 with Possible Topological Surface States

doi:10.1002/adma.201901942

	Discovery of Superconductivity in 2M WS2 with Possible Topological Surface States
	Fang, Yuqiang; Pan, Jie; Zhang, Dongqin; Wang, Dong; Hirose, Hishiro T.; Terashima, Taichi; Uji, Shinya; Yuan, Yonghao; Li, Wei; Tian, Zhen
刊名	ADVANCED MATERIALS
	2019-07-01
卷号	31 期号:30
关键词	2M WS2 superconductivity topological surface states
ISSN号	0935-9648
DOI	10.1002/adma.201901942
文献子类	Article
英文摘要	Recently the metastable 1T '-type VIB-group transition metal dichalcogenides (TMDs) have attracted extensive attention due to their rich and intriguing physical properties, including superconductivity, valleytronics physics, and topological physics. Here, a new layered WS2 dubbed "2M" WS2, is constructed from 1T ' WS2 monolayers, is synthesized. Its phase is defined as 2M based on the number of layers in each unit cell and the subordinate crystallographic system. Intrinsic superconductivity is observed in 2M WS2 with a transition temperature T-c of 8.8 K, which is the highest among TMDs not subject to any fine-tuning process. Furthermore, the electronic structure of 2M WS2 is found by Shubnikov-de Haas oscillations and first-principles calculations to have a strong anisotropy. In addition, topological surface states with a single Dirac cone, protected by topological invariant Z(2), are predicted through first-principles calculations. These findings reveal that the new 2M WS2 might be an interesting topological superconductor candidate from the VIB-group transition metal dichalcogenides.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26994]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Fang, Yuqiang,Pan, Jie,Zhang, Dongqin,et al. Discovery of Superconductivity in 2M WS2 with Possible Topological Surface States[J]. ADVANCED MATERIALS,2019,31(30).
APA	Fang, Yuqiang.,Pan, Jie.,Zhang, Dongqin.,Wang, Dong.,Hirose, Hishiro T..,...&Huang, Fuqiang.(2019).Discovery of Superconductivity in 2M WS2 with Possible Topological Surface States.ADVANCED MATERIALS,31(30).
MLA	Fang, Yuqiang,et al."Discovery of Superconductivity in 2M WS2 with Possible Topological Surface States".ADVANCED MATERIALS 31.30(2019).