Atomic scale evidence for faceting stabilization of a polar oxide surface

Autor(en): Ostendorf, Frank
Torbruegge, Stefan
Reichling, Michael 
Stichwörter: 10(1)OVER-BAR0; ELECTRONIC-STRUCTURE; HYDROGEN; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Applied; Physics, Condensed Matter; STABILITY; STEPS; ZNO
Erscheinungsdatum: 2008
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 77
Ausgabe: 4
Zusammenfassung: 
By highest-resolution dynamic scanning force microscopy operated in the non-contact mode, we reveal the complex stabilization mechanism of polar zinc-terminated ZnO(0001). The nanoscopic and atomic structures unveiled corroborate a model of stabilization via triangular structures. High-temperature preparation (T > 1300 K) yields a phase with an additional stabilization by faceting in the form of highly ordered step arrays. The terraces between steps are partly covered with triangular reconstructions exhibiting exclusively {10 (1) over bar0} nanofacets on step edges. Both mechanisms together allow a complete stabilization of the surface without the involvement of adsorbates.
ISSN: 24699950
DOI: 10.1103/PhysRevB.77.041405

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