期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 25, 页码 5376-5379出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.5376
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Atomically resolved scanning tunneling microscopy reveals the existence of triangular (111) bulk terminated NaCl islands. The islands can be grown by subsequent adsorption of Na and Cl-2 on AI(111) and Al(100) or by conversion of stoichiometric NaCl(100) islands to NaCl(111) via additional Na adsorption. The NaCl(111) islands have Na-Cl-Na sandwich structure. Ab initio calculations of the electronic structure of these islands show that each of the Na atoms carries half a positive elementary charge, leaving the islands neutral and explaining the existence of an otherwise unstable surface.
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