Abstract

A theoretical study of the optical absorption of perfectly ordered titanium carbides Ti${\mathrm{C}}_{x}$ is reported for different carbon concentrations $(x$=1, 0.75, 0.50, and 0.25). The optical conductivity is calculated within the framework of the linear muffin-tin orbital method in the atomic-sphere approximation. The effect of carbon vacancies on the optical conductivity is discussed and the origin of the different absorption peaks is traced back to particular interband transitions.

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