单层
材料科学
扫描隧道显微镜
碲
分子束外延
密度泛函理论
基质(水族馆)
垂直的
格子(音乐)
化学物理
纳米技术
外延
凝聚态物理
结晶学
图层(电子)
计算化学
化学
物理
几何学
海洋学
数学
地质学
声学
冶金
作者
Wenzhi Quan,Can Hong,Shuangyuan Pan,Jingyi Hu,Qilong Wu,Zehui Zhang,Fan Zhou,Feipeng Zheng,Zhili Zhu,Yanfeng Zhang
标识
DOI:10.1021/acsami.2c20400
摘要
As an emerging member of monoelemental two-dimensional (2D) materials, 2D tellurium (tellurene) has recently attracted intensive attention due to its polymorphism arising from the multivalent nature and fascinating properties such as wide-range band gaps, high carrier mobilities, etc. Herein, we predict the formation of a rectangular-phase tellurene on Ni(111) by first-principles density functional theory (DFT) calculations and realize its direct syntheses and characterizations by molecular beam epitaxy (MBE) and scanning tunneling microscopy (STM). We reveal that the monolayer rectangular tellurene and underlying Ni(111) substrate are strongly coupled, along with good lattice registry along two mutually perpendicular directions, which serves as the key driving force for the tellurene formation. We also uncover the unique morphological transitions of Te/Ni(111) from rectangular tellurene monolayer, to uniform periodic striped patterns at the second layer, and then to thick striped patterns. This work should offer valuable insights for the substrate-mediated syntheses of monoelemental 2D materials, thus propelling their phase engineering and intriguing property explorations.
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