Si(111) 7 multiplied by 7 TO ″1 multiplied by 1″ TRANSITION: A SUMMARY.

M. B. Webb, P. A. Bennett

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


A summary is presented of a low-energy electron diffraction study of the Si(111) 7 multiplied by 7 to ″1 multiplied by 1″ transitions. Excess diffuse scattering appears during the transition and demonstrates that the transition is to a disordered selvedge at high temperatures. The long-range order shows critical behavior for reduced temperature between 0. 93 and 0. 99 with a critical exponent beta equals 0. 11 plus or minus 0. 15 which is similar to values for 2d Ising and Potts models but distinctly different from the meanfield values. Critical scattering with properties similar to those for mean-field or 2d Ising models is not observed. The relaxation time for ordering diverges near T//c but the disordering kinetics remain faster than the experimental time constant of . 05 s.

Original languageEnglish (US)
Pages (from-to)847-851
Number of pages5
JournalJournal of vacuum science & technology
Issue number3
StatePublished - 1980
Externally publishedYes
EventProc of the Natl Symp of the Am Vac Soc, 27th, Pt 2 - Detroit, MI, Engl
Duration: Oct 13 1980Oct 17 1980

ASJC Scopus subject areas

  • General Engineering


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