[en] We show that the electronic part of the linear magnetoelectric response, usually omitted in first-principles studies, can be comparable in magnitude to that mediated by polar lattice distortions, even in strong magnetoelectrics. Using a self-consistent response to a Zeeman field for noncollinear spins, we show how polarization emerges in magnetoelectrics through both electronic and lattice contributions-analogous to the high- and low-frequency responses of dielectrics. The approach we use is computationally simple, and can be used to study linear and nonlinear responses to magnetic fields.
Disciplines :
Physics
Author, co-author :
Bousquet, Eric ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Spaldin, Nicola A
Delaney, Kris T
Language :
English
Title :
Unexpectedly Large Electronic Contribution to Linear Magnetoelectricity
Publication date :
2011
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
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