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Issue 39, 2015
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Magnetism tuned by the charge states of defects in bulk C-doped SnO2 materials

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Abstract

To analyze the controversial conclusions on the magnetism of C-doped SnO2 (SnO2:C) bulk materials between theoretical calculations and experimental observations, we propose the critical role of the charge states of defects in the geometric structures and magnetism, and carry out a series of first principle calculations. By changing the charge states, we can influence Bader charge distributions and atomic orbital occupancies in bulk SnO2:C systems, which consequently conduct magnetism. In all charged SnO2:C supercells, C-2px/py/pz electron occupancies are significantly changed by the charge self-regulation, and thus they make the C-2p orbitals spin polarized, which contribute to the dominant magnetic moment of the system. When the concentration of C dopant in the SnO2 supercell increases, the charge redistribution assigns extra electrons averagely to each dopant, and thus effectively modulates the magnetism. These findings provide an experimentally viable way for controlling the magnetism in these systems.

Graphical abstract: Magnetism tuned by the charge states of defects in bulk C-doped SnO2 materials

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Supplementary files

Article information


Submitted
04 May 2015
Accepted
07 Sep 2015
First published
07 Sep 2015

Phys. Chem. Chem. Phys., 2015,17, 26429-26434
Article type
Paper
Author version available

Magnetism tuned by the charge states of defects in bulk C-doped SnO2 materials

Y. Lu, Z. C. Ling, W. Cong and P. Zhang, Phys. Chem. Chem. Phys., 2015, 17, 26429
DOI: 10.1039/C5CP02577J

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