Abstract
InP(001) surfaces prepared by sputter-annealing and by annealing in a P 2 atmosphere have been studied using scanning tunnelling microscopy (STM). Annealing a phosphorus-rich (2×1) surface to above 600 K leads to the formation of the (2×4) surface. The filled- and empty-state STM images obtained from large areas with ordered (2×4) reconstruction are consistent with a two phosphorus dimer–two missing dimer model. The transition from (2×1) to (2×4) reconstruction proceeds through an intermediate stage where local regions showing mixed (2×4)/(2×2) forms are observed.
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