Optical-absorption study of RuS2-xSex single crystals

Jeng Kuang Huang; Ying Sheng Huang; Tzuen Rong Yang

doi:10.1063/1.360064

Optical-absorption study of RuS_2-xSe_x single crystals

Jeng Kuang Huang^*, Ying Sheng Huang, Tzuen Rong Yang

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

An optical-absorption study of synthetic RuS_2-xSe_x single crystals is reported over a temperature range from 80 to 300 K. The data are fitted to several expressions for the shape of the absorption edge, with the best fit being to that expected for indirect allowed transitions. The band gaps at any temperature varies smoothly with the Se composition x, indicating that the nature of the band edges are similar for RuS₂, RuSe₂, and the compounds of intermediate compositions. The indirect band gaps of various temperatures are determined and their temperature dependence are analyzed by the Varshni equation [Physica 34, 149 (1967)] and an empirical expression proposed by O'Donnell and Chen [Appl. Phys. Lett. 58, 2924 (1991)]. The parameters that describe the temperature dependence of energy gap of RuS_2-xSe_x are evaluated and discussed.

Original language	English
Pages (from-to)	2691-2696
Number of pages	6
Journal	Journal of Applied Physics
Volume	78
Issue number	4
DOIs	https://doi.org/10.1063/1.360064
Publication status	Published - 1995

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Optical-absorption study of RuS2-xSex single crystals",

abstract = "An optical-absorption study of synthetic RuS2-xSex single crystals is reported over a temperature range from 80 to 300 K. The data are fitted to several expressions for the shape of the absorption edge, with the best fit being to that expected for indirect allowed transitions. The band gaps at any temperature varies smoothly with the Se composition x, indicating that the nature of the band edges are similar for RuS2, RuSe2, and the compounds of intermediate compositions. The indirect band gaps of various temperatures are determined and their temperature dependence are analyzed by the Varshni equation [Physica 34, 149 (1967)] and an empirical expression proposed by O'Donnell and Chen [Appl. Phys. Lett. 58, 2924 (1991)]. The parameters that describe the temperature dependence of energy gap of RuS2-xSex are evaluated and discussed.",

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year = "1995",

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AU - Huang, Jeng Kuang

AU - Huang, Ying Sheng

AU - Yang, Tzuen Rong

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Y1 - 1995

N2 - An optical-absorption study of synthetic RuS2-xSex single crystals is reported over a temperature range from 80 to 300 K. The data are fitted to several expressions for the shape of the absorption edge, with the best fit being to that expected for indirect allowed transitions. The band gaps at any temperature varies smoothly with the Se composition x, indicating that the nature of the band edges are similar for RuS2, RuSe2, and the compounds of intermediate compositions. The indirect band gaps of various temperatures are determined and their temperature dependence are analyzed by the Varshni equation [Physica 34, 149 (1967)] and an empirical expression proposed by O'Donnell and Chen [Appl. Phys. Lett. 58, 2924 (1991)]. The parameters that describe the temperature dependence of energy gap of RuS2-xSex are evaluated and discussed.

AB - An optical-absorption study of synthetic RuS2-xSex single crystals is reported over a temperature range from 80 to 300 K. The data are fitted to several expressions for the shape of the absorption edge, with the best fit being to that expected for indirect allowed transitions. The band gaps at any temperature varies smoothly with the Se composition x, indicating that the nature of the band edges are similar for RuS2, RuSe2, and the compounds of intermediate compositions. The indirect band gaps of various temperatures are determined and their temperature dependence are analyzed by the Varshni equation [Physica 34, 149 (1967)] and an empirical expression proposed by O'Donnell and Chen [Appl. Phys. Lett. 58, 2924 (1991)]. The parameters that describe the temperature dependence of energy gap of RuS2-xSex are evaluated and discussed.

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Optical-absorption study of RuS_2-xSe_x single crystals

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