Density-functional study of the structure and stability of ZnO surfaces

Details Density-functional study of the structure and stability of ZnO surfaces Density-functional study of the structure and stability of ZnO surfaces

2002-06-27

arxiv.org/abs/cond-mat/0206549v1

Physics

Condensed Matter

Materials Science

12 pages, with 9 postscript figures embedded. Uses REVTEX and epsf macros

Scientific paper

10.1103/PhysRevB.67.035403

An extensive theoretical investigation of the nonpolar (10$\bar{1}$0) and (11$\bar{2}$0) surfaces as well as the polar zinc terminated (0001)--Zn and oxygen terminated (000$\bar{1}$)--O surfaces of ZnO is presented. Particular attention is given to the convergence properties of various parameters such as basis set, k--point mesh, slab thickness, or relaxation constraints within LDA and PBE pseudopotential calculations using both plane wave and mixed basis sets. The pros and cons of different approaches to deal with the stability problem of the polar surfaces are discussed. Reliable results for the structural relaxations and the energetics of these surfaces are presented and compared to previous theoretical and experimental data, which are also concisely reviewed and commented.

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