Optical transitions in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>β</mi></math></span>-Fe<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Si</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> films

Lianwei Wang; M. Östling; Kai Yang; Linhong Qin; Chenglu Lin; Xiangdong Chen; Shichang Zou; Yuxiang Zheng; Youhua Qian

doi:10.1103/PhysRevB.54.R11126

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Optical transitions in $β$ -Fe ${Si}_{2}$ films

Lianwei Wang^* and M. Östling

Kai Yang and Linhong Qin

Chenglu Lin, Xiangdong Chen, and Shichang Zou

Yuxiang Zheng and Youhua Qian

Royal Institute of Technology, Solid State Electronics, Electrum 229, S-164 40, Kista-Stockholm, Sweden

Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China

Department of Physics, Fudan University, Shanghai 200433, People's Republic of China

^*Permanent address: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.

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Phys. Rev. B 54, R11126(R) – Published 15 October, 1996

DOI: https://doi.org/10.1103/PhysRevB.54.R11126

Abstract

The optical transition in a $β$ -Fe ${Si}_{2}$ film has been characterized by photoreflectance. The direct transition has been determined to be at 0.874 eV. Moreover, a direct transition at 0.860 eV has also been observed and might be related to the impurity band. The reflectivity of the $β$ -Fe ${Si}_{2}$ films was investigated, and a transition near 1.2 eV was observed. Finally, a comparison of spectroscopic ellipsometric measurements on different samples is given.

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Physical Review B

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Optical transitions in $β$ -Fe ${Si}_{2}$ films