Fachgruppe Nanostrukturierte Materialien |
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Institut f. Physik
Tel.: +49 345 55 25321 |
W. Weigand, A. Müller, L. Kilian, T. Schallenberg, P. Bach, G. Schmidt, L.W. Molenkamp, O. Bunk, R.L. Johnson, C. Kumpf, E. Umbach Structural investigation of the ZnSe(001)-c(2x2) surface Phys. Rev. B 68 (24) (2015-02-24 16:18:44), 241314/1-241314/4 Zinc selenide is a model system for II-VI compound semiconductors. The geometric structure of the clean (001)?c(2×2) surface has recently been the subject of intense debate. We report here a surface x-ray-diffraction study on the ZnSe(001)?c(2×2) surface performed under ultrahigh vacuum using synchrotron radiation which reveals the precise atomic geometry. The results are in excellent agreement with the Zn-vacancy model proposed earlier on the basis of density-functional theory calculations and unequivocally establish the correct equilibrium surface structure. http://journals.aps.org/prb/abstract/10.1103/PhysRevB.68.241314 |