The importance of the electronic contribution to linear magnetoelectricity

Details The importance of the electronic contribution to linear magnetoelectricity The importance of the electronic contribution to linear magnetoelectricity

2009-12-07

arxiv.org/abs/0912.1335v2

Physics

Condensed Matter

Materials Science

5 pages, 3 figures

Scientific paper

We demonstrate that the electronic contribution to the linear magnetoelectric response, usually omitted in first-principles studies, can be comparable in magnitude to that mediated by lattice distortions, even for materials in which responses are strong. Using a self-consistent Zeeman response to an applied magnetic field for noncollinear electron spins, we show how electric polarization emerges in linear magnetoelectrics through both electronic- and lattice-mediated components -- in analogy with the high- and low-frequency dielectric response to an electric field. The approach we use is conceptually and computationally simple, and can be applied to study both linear and non-linear responses to magnetic fields.

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