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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5056

Title: Fluorination induced half metallicity in two-dimensional few zinc oxide layers
Authors: Chen, Qian
Wang, Jinlan
Zhu, Liyan
Wang, Shudong
Ding, Feng
Subjects: Bonds (chemical)
Density functional theory
Ferromagnetic materials
II-VI semiconductors
Magnetic moments
Magnetoelectronics
Wide band gap semiconductors
Zinc compounds
Issue Date: 28-May-2010
Publisher: American Institute of Physics
Citation: Journal of chemical physics, 28 May 2010, v. 132, no. 20, 204703, p. 1-6.
Abstract: We systematically explore the stability, bonding characteristics, and electronic and magnetic properties of two-dimensional (2D) few zinc oxide layers (few-ZnOLs) with or without fluorination by using density functional theory approach. The pristine few-ZnOLs favor stable planar hexagonal structures, which stem from their unique bonding characteristics: The intralayer Zn–O interaction is dominated by covalent bonding while the interaction between layers is weak ionic bonding. Furthermore, we demonstrate that fluorination from one side turns the planar few-ZnOLs back to the wurtzitelike corrugated structure, which enhances the stability of the 2D ZnO films. The fluorinated few-ZnOLs are ferromagnets with magnetic moments as high as 0.84, 0.87, 0.89, and 0.72 μв per unit cell for the number of layers of N=1, 2, 3, and 4, respectively. Most interestingly, the fluorination can also turn few-ZnOLs from semiconductor into half metallicity with a half-metal gap up to 0.56 eV. These excellent electronic and magnetic properties may open 2D ZnO based materials great opportunity in future spintronics.
Description: DOI: 10.1063/1.3442908
Rights: © 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Q. Chen et al., J. Chem. Phys. 132, 204703 (2010) and may be found at http://link.aip.org/link/?jcp/132/204703.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/5056
ISSN: 0021-9606 (print)  
1089-7690 (online)
Appears in Collections:ITC Journal/Magazine Articles

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