Wurtzite-type CoO nanocrystals in ultrathin ZnCoO films.
نویسندگان
چکیده
Surface x-ray diffraction experiments reveal that, in cobalt-doped ZnO films two to five monolayers thick, Wurtzite-type CoO nanocrystals are coherently embedded within a hexagonal boron-nitride- (h-BN)-type ZnO matrix, supporting the model of a phase separation. First-principles calculations confirm that, in contrast with ZnO, the formation of h-BN-type CoO is unfavorable in the ultrathin film limit. Our results are important for understanding magnetic properties of transition metal-doped semiconductors in general.
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ورودعنوان ژورنال:
- Physical review letters
دوره 102 15 شماره
صفحات -
تاریخ انتشار 2009