콘텐츠 본문
논문 해외 국제전문학술지(SCI급) SURFACE FERROMAGNETIC P-TYPE ZNO NANOWIRES THROUGH CHARGE TRANSFER DOPING
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2012-02
- 저자명 홍기하공동(참여),이성훈,김종섭,김성진,김기남,신재광
- 학술지명 APPLIED MATERIALS AND INTERFACES
- 발행처명 American Chemical Society
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 6
논문 초록 (Abstract)
We report first-principles theoretical investigation of p-type charge transfer doping of zinc oxide (ZnO) nanowires by molecular adsorption. We find that spontaneous dissociative adsorption of fluorine molecules introduces half-emptying of otherwise fully filled oxygen-derived surface states. The resulting surface Fermi level is so close to the valence band maximum of the ZnO nanowire that the nanowire undergoes significant p-type charge transfer doping. Those half-filled surface states are fully spin-polarized and lead to surface ferromagnetism that is stable at room temperature. We also analyze the kinetic control regime of the surface transfer doping and find that it may result in nonequilibrium steady states. The present results suggest that postgrowth engineering of surface states has high potential in manipulating ZnO nanostructures useful for both electronics and spintronics.
