Transport and optical properties of FeSi
Published Web Locationhttps://doi.org/10.1016/0921-4526(94)00592-J
We have investigated the electrodynamic response of the cubic compound FeSi, including δDC(T) and the optical reflectivity as a function of temperature over a very large frequency range, extending from the far infrared regime up to the ultraviolet spectral range. By lowering the temperature a gap excitation at about 800 cm-1 and several absorption peaks were found. Moreover, the spectral weight lost below the gap reappears just above it and is not distributed over an energy range of order eV, as suggested in previous work. © 1995.