Epitaxially grown monolayer VSe2: an air-stable magnetic two-dimensional material with low work function at edges

Zhong-Liu Liu; Xu Wu; Yan Shao; Jing Qi; Yun Cao; Li Huang; Chen Liu; Jia-Ou Wang; Qi Zheng; Zhi-Li Zhu; Kurash Ibrahim; Ye-Liang Wang; Hong-Jun Gao

doi:10.1016/j.scib.2018.03.008

Epitaxially grown monolayer VSe₂: an air-stable magnetic two-dimensional material with low work function at edges

Sci Bull (Beijing). 2018 Apr 15;63(7):419-425. doi: 10.1016/j.scib.2018.03.008. Epub 2018 Mar 20.

Authors

Zhong-Liu Liu¹, Xu Wu¹, Yan Shao¹, Jing Qi¹, Yun Cao¹, Li Huang¹, Chen Liu², Jia-Ou Wang², Qi Zheng¹, Zhi-Li Zhu¹, Kurash Ibrahim², Ye-Liang Wang³, Hong-Jun Gao⁴

Affiliations

¹ Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
² Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
³ Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China; CAS Center for Excellence in Topological Quantum Computation, Beijing 100049, China. Electronic address: ylwang@iphy.ac.cn.
⁴ Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China; CAS Center for Excellence in Topological Quantum Computation, Beijing 100049, China. Electronic address: hjgao@iphy.ac.cn.

PMID: 36658936
DOI: 10.1016/j.scib.2018.03.008

Abstract

Recent experimental breakthroughs open up new opportunities for magnetism in few-atomic-layer two-dimensional (2D) materials, which makes fabrication of new magnetic 2D materials a fascinating issue. Here, we report the growth of monolayer VSe₂ by molecular beam epitaxy (MBE) method. Electronic properties measurements by scanning tunneling spectroscopy (STS) method revealed that the as-grown monolayer VSe₂ has magnetic characteristic peaks in its electronic density of states and a lower work-function at its edges. Moreover, air exposure experiments show air-stability of the monolayer VSe₂. This high-quality monolayer VSe₂, a very air-inert 2D material with magnetism and low edge work function, is promising for applications in developing next-generation low power-consumption, high efficiency spintronic devices and new electrocatalysts.

Keywords: Epitaxial growth; Magnetism; Scanning tunneling microscopy (STM); Two-dimensional materials; VSe(2).