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Your search keyword '"Liu, Guo-lei"' showing total 5 results
Start Over Author "Liu, Guo-lei" Publisher elsevier b.v.
5 results on '"Liu, Guo-lei"'

5. Investigating the ferromagnetic exchange interaction in Co-doped ZnO magnetic semiconductors

Author

Hu, Shu-jun, Yan, Shi-shen, Zhao, Ming-wen, Lin, Xue-ling, Yao, Xin-xin, Han, Chong, Tian, Yu-feng, Chen, Yan-xue, Liu, Guo-lei, and Mei, Liang-mo

Subjects
*FERROMAGNETIC materials, *ZINC oxide, *MAGNETIC semiconductors, *IONS, *COMPLEX compounds, *VANADIUM oxide, *SEMICONDUCTOR defects
Abstract

We propose a defect-complex model to clarify the origin of ferromagnetism in Co-doped ZnO magnetic semiconductors, based on first-principles calculations. The spin-polarized defect states of oxygen vacancy (VO) induced by the charge-transfer process are essential to the ferromagnetism. Depending on the charge state of VO and carrier concentration, (VO 2+ +zinc interstitial) and (VO 0 +zinc vacancy) defect complexes are predicted to control the ferromagnetic exchange interaction between the Co ions for insulating and conductive samples, respectively. [ABSTRACT FROM AUTHOR]

Published
2011
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