Abstract
Utilizing scanning tunneling microscopy, we investigate the coverage- and temperature-dependent morphology evolution of submonolayer Fe on Ru(0001) near the surface alloying temperature. Submonolayer Fe deposited on Ru(0001) at room temperature grows in the three-dimensional island format. The morphology is investigated after annealing at various temperatures. With annealing around 900 K, large compact islands are divided into small pieces by triangular vacancy islands and labyrinthine antistripes. The width of the antistripes increases with increasing temperature, in sharp contrast with other systems where the opposite behavior was commonly found. The observed anomaly can be attributed to simultaneous surface alloying and amorphization during the annealing process.
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