Analysis of the atomic geometries of the (101-0) and (112 -0) surfaces of CdSe by low-energy-electron diffraction and low-energy-positron diffraction

T. N. Horsky, G. R. Brandes, K. F. Canter, C. B. Duke, A. Paton, D. L. Lessor, Antoine Kahn, S. F. Horng, K. Stevens, K. Stiles, A. P. Mills

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Abstract

The relaxed atomic geometries of the low-index cleavage surfaces of wurtzite-structure CdSe are determined via comparison of dynamical scattering calculations with measured low-energy-electron-diffraction (LEED) and low-energy-positron-diffraction (LEPD) intensities. Both surfaces are found to be relaxed in accordance with recently proposed geometries deduced from total-energy-minimization calculations. Since this analysis represents the use of LEPD for quantitative surface-structure determination, we discuss the experimental technique, the differences observed between LEPD and LEED, and the complementary nature of the two spectroscopies.

Original languageEnglish (US)
Pages (from-to)7011-7026
Number of pages16
JournalPhysical Review B
Volume46
Issue number11
DOIs
StatePublished - Jan 1 1992

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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