单斜晶系
拓扑绝缘体
超导电性
凝聚态物理
表面状态
拓扑(电路)
材料科学
各向异性
亚稳态
拓扑序
角分辨光电子能谱
物理
电子结构
量子
曲面(拓扑)
量子力学
几何学
组合数学
数学
分子
作者
Yuqiang Fang,Jie Pan,Dongqin Zhang,Dong Wang,Hishiro T. Hirose,Taichi Terashima,S. Uji,Yonghao Yuan,Wei Li,Zhen Tian,Jiamin Xue,Yuguang Ma,Wei Zhao,Qi-Kun Xue,Gang Mu,Haijun Zhang,Fuqiang Huang
标识
DOI:10.1002/adma.201901942
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 Tc 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 Z2 , 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.
科研通智能强力驱动
Strongly Powered by AbleSci AI