磷烯
之字形的
单层
有效质量(弹簧-质量系统)
材料科学
凝聚态物理
带隙
半导体
拉伤
光电子学
纳米技术
物理
几何学
内科学
医学
量子力学
数学
作者
Wei Zhang,Feng Li,Junsong Hu,Ping Zhang,Jiuren Yin,Xianqiong Tang,Yong Jiang,Bozhao Wu,Yanhuai Ding
标识
DOI:10.1088/1361-648x/aa8e7e
摘要
The effects of uniaxial strain on the structure, band gap and transmission carriers of monolayer phosphorene were investigated by first-principles calculations. The strain induced semiconductor-metal as well as direct–indirect transitions were studied in monolayer phosphorene. The position of CBM which belonged to indirect gap shifts along the direction of the applied strain. We have concluded the change rules of the carrier effective mass when plane strains are applied. In band structure, the sudden decrease of band gap or the new formation of CBM (VBM) causes the unexpected change in carrier effective mass. The effects of zigzag and armchair strain on the effective electron mass in phosphorene are different. The strain along zigzag direction has effects on the electrons effective mass along both zigzag and armchair direction. By contrast, armchair-direction strain seems to affect only on the free electron mass along zigzag direction. For the holes, the effective masses along zigzag direction are largely affected by plane strains while the effective mass along armchair direction exhibits independence in strain processing. The carrier density of monolayer phosphorene at 300 K is calculated about cm−2, which is greatly influenced by the temperature and strain. Strain engineering is an efficient method to improve the carrier density in phosphorene.
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