Density functional theory studies of the optical properties of a β-FeSi (100)/Si(001) interface at high pressure

被引：0

作者：

李海涛 ^{[1
,2
]}

钱军 ^{[3
]}

韩芳芳 ^{[1
]}

李廷会 ^{[1
]}

机构：

[1] College of Electronic Engineering,Guangxi Normal University

[2] Department of Physics,Chengde Teacher's College for Nationalities

[3] National Laboratory of Solid State Microstructures and Department of Physics,Nanjing

来源：

Journal of Semiconductors | 2013年 / 34卷 / 07期

关键词：

D O I：

暂无

中图分类号：

TN304.12 [];

学科分类号：

摘要：

<正>High pressure has a significant influence onβ-FeSi2 band gaps and optical absorption tuning.In this work,using density functional theory,we investigate the effect of high pressure on the optical absorption behavior of aβ-FeSi2(100)/Si(001) interface with some Si vacancies.As the pressure increases,the optical absorption peak down-shifts firstly,reach minimum values,and then un-shifts slowly.The electronic orbital analysis indicates that the electronic transition between the highest occupied states and the lowest unoccupied states mainly originate from Fe atoms at the interface regions.Structural analysis discloses that the Si(001) slab partially offsets the pressure exerted on theβ-FeSi2(100) interface,but this effect will become weaker with further increasing pressure,and this physical mechanism plays an important role in its optical absorption behavior.

引用

页码：11 / 14

页数：4

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