Plasma resonance in granular gallium films deposited on rough NACl and KCl single-crystal surfaces |
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Authors: | I N Shklyarevskiĭ Yu Yu Bondarenko N A Makarovskiĭ |
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Institution: | (1) Kharkov State University, Kharkov, 310077, Ukraine |
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Abstract: | Granular gallium films deposited in high vacuum on the rough surfaces of NaCl and KCl single crystals maintained at 400°C consist of two layers, in which two resonance bands are excited simultaneously. In isolated grains of the upper layer, a band at the normal electron oscillation frequency ω0 is excited. As a result of supercooling, the grains are in the liquid state. The gallium plasma frequency calculated from the measured ω0 and dielectric constants of NaCl and KCl coincides with that obtained by other authors by metallooptic methods. In gallium deposited on room-temperature substrates, only one resonance band is excited, with the interband absorption band superposed on its low-frequency edge. |
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