Selective light-induced mass transport in amorphous AsxSe100−x films driven by the composition tuning: Effect of temperature on maximum acceleration

Under irradiation of amorphous $As_xSe_100-x$ films by band-gap light, it was observed that lateral mass transport of the film material changed the direction of movement in the region (4 < x < 5 at%.) of topological structural transition (crossover "from light to dark" to "from dark to light"). We propose a model that qualitatively describes the observed phenomenon. In experimental testing of the model by Kelvin probe force microscopy, for the first time to our knowledge, it was detected that with the increase of temperature (from ambient to glass-transition temperature, Tg) photo-induced mass transport in glassy semiconductors occurs with the rates, which significantly exceed those at room temperature.