Low-frequency square-wave modulation of a rf discharge in silane diluted with a rare gas brought about an improvement in the deposition rate of amorphous hydrogenated silicon films and in the film quality as well as a drastic suppression of powder concentration in the discharge space. These results can be explained by a SiH3 density in the modulated discharge that is high compared to that without modulation, because of the electron density enhancement resulting from the modulation and also because the lifetime of SiH3 radicals is much longer than those of SiHn radicals (n=0–2).
The effect of a mirror field on field reconnection in an FRC formation stage has been experimentally investigated. Reconnection is promoted when the mirror-field intensity is above a critical value at which the azimuthal electron drift velocity exceeds the ion sound velocity. This implies that the generation of some instabilities is important for the reconnection.
The large zero-point oscillation of energy ~0.1–1 eV of strong coupling hole carriers in layered perovskite (LP) conductor is shown to provide effective field B* ~ 103–4 T causing fractional quantum Hall effect (FQHE) when space charge and moderate localization are present. The quasiparticle excitation spectrum of the FQHE system is calculated. The FQHE state is a macroscopic quantum state where macroscopic interference effect is expected. Using (001) La 2-x Sr x CuO 4-y (LSCO) film, we observed "dc dielectric interference" and the interference effect at 28 THz, which are explicable by the FQHE in the layered perovskite film.
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