Surface-induced magnetism in C-doped SnO$_{2}$

Details Surface-induced magnetism in C-doped SnO$_{2}$ Surface-induced magnetism in C-doped SnO$_{2}$

2010-01-14

arxiv.org/abs/1001.2443v2

Appl. Phys. Lett. 96, 052508 (2010)

Physics

Condensed Matter

Materials Science

3 pages, 3 figures

Scientific paper

10.1063/1.3302468

The magnetism of C-doped SnO$_{2}$ (001) surfaces is studied using first-principles calculations. It is found that carbon does not induce magnetism in bulk SnO$_{2}$ when located at the oxygen site, but shows a large magnetic moment at the SnO$_{2}$ (001) surface. The magnetic moment is mainly contributed by the carbon atoms due to empty minority spins of $p$ orbitals and is localized at the surface and subsurface atoms. No magnetism is observed when the carbon atom is located at the subsurface oxygen sites. The origin of magnetism is discussed in the context of surface bonding.

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