Surface transformations on annealed GaAs(001)

C. W. Snyder, J. Sudijono, Chi Hang Lam, M. D. Johnson, B. G. Orr

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)


Studies on the surface evolution during vacuum annealing of GaAs(001) have been performed using scanning tunneling microscopy. The transition from an ordered (2×4)/c(2×8) reconstructed surface to an ordered mixed phase (2×6)/(3×6) reconstruction is observed as the annealing temperature is increased from 450 to 500°C. The transition to the high-temperature phase is mediated by a transient disordered state. We discuss the origin and role of this state. At higher annealing temperatures, T520°C, in the (2×6)/(3×6) phase, we find that terrace edges become unstable, and the surface evolves to a morphology similar to those observed in general pattern-forming systems. A mechanism based on diffusion-limited growth of surface vacancies is discussed.
Original languageEnglish
Pages (from-to)18194-18199
Number of pages6
JournalPhysical Review B
Issue number24
Publication statusPublished - 1 Jan 1994
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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