杰纳斯
自旋电子学
光催化
材料科学
单层
半导体
应变工程
带隙
电子结构
纳米技术
过渡金属
凝聚态物理
拉伤
光电子学
物理
化学
铁磁性
内科学
催化作用
医学
生物化学
硅
作者
Ming-Yang Liu,Yao He,Xuan Li,Kai Xiong
摘要
Recently, MA2Z4 materials have received tremendous attention due to their amazing electronic, spintronic, and optoelectronic properties. In this work, we propose a class of 2D Janus materials WSiGeZ4 (Z = N, P, and As). It was found that their electronic and photocatalytic properties are sensitive to the change of the Z element. Biaxial strain results in an indirect-direct band gap transition in WSiGeN4 and a semiconductor-metal transition in WSiGeP4 and WSiGeAs4. Comprehensive studies demonstrate that these transitions as well as valley-contrasting physics are closely related to the crystal field induced orbital distribution. By taking into account several features of the excellent photocatalysts reported for water splitting, we predict three promising photocatalytic materials WSi2N4, WGe2N4, and WSiGeN4. Their optical and photocatalytic properties can be well modulated by applying biaxial strain. Our work not only provides a class of potential electronic and optoelectronic materials but also enriches the study of Janus MA2Z4 materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI