Natural charge spatial separation and quantum confinement of ZnO/GaN core/shell nanowires

Details Natural charge spatial separation and quantum confinement of ZnO/GaN core/shell nanowires Natural charge spatial separation and quantum confinement of ZnO/GaN core/shell nanowires

2010-08-07

arxiv.org/abs/1008.1349v1

Physics

Condensed Matter

Materials Science

3 pages, 3 figures

Scientific paper

We performed density-functional calculations to investigate the electronic structure of ZnO/GaN core/shell heterostructured nanowires (NWs) orientating along <0001> direction. The build-in electric filed arising from the charge redistribution at the {1-100} interfaces and the band offsets were revealed. ZnO-core/GaN-shell NWs rather than GaN-core/ZnO-shell ones were predicted to exhibit natural charge spatial separation behaviors, which are understandable in terms of an effective mass model. The effects of quantum confinement on the band gaps and band offsets were also discussed.

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