ZnSe(100) surface: Atomic configurations, composition, and surface dipole

W. Chen; A. Kahn; P. Soukiassian; P. S. Mangat; J. Gaines; C. Ponzoni; D. Olego

doi:10.1103/PhysRevB.49.10790

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ZnSe(100) surface: Atomic configurations, composition, and surface dipole

W. Chen, A. Kahn, P. Soukiassian, P. S. Mangat, J. Gaines, C. Ponzoni, and D. Olego

Phys. Rev. B 49, 10790(R) – Published 15 April 1994

Abstract

Chemical composition, core-level line shape, and electron affinity measurements are performed on the Se-terminated (2×1) and Zn-terminated c(2×2) ZnSe(100) surfaces. The (2×1) reconstruction corresponds to a complete monolayer of Se dimers with one filled dangling bond per surface atom. The c(2×2) reconstruction corresponds to a half-monolayer vacancy structure which leaves twofold-coordinated Zn atoms in the top layer. The 150-meV decrease in surface electron affinity at the (2×1)→c(2×2) transition is consistent with this model and results from a dipole induced by the charge transfer required to empty and fill all cation and anion dangling bonds on the c(2×2) surface, respectively.

Received 24 January 1994

DOI:https://doi.org/10.1103/PhysRevB.49.10790

Authors & Affiliations

W. Chen and A. Kahn

Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544

P. Soukiassian

Commissariat a l’Energie Atomique, Centre d’Etudes de Saclay, 91191 Gif-sur-Yvette Cedex, France
Department of Physics, Northern Illinois University, Dekalb, Illinois 60115

P. S. Mangat