Article (Scientific journals)
Unveiling the Room-Temperature Magnetoelectricity of Troilite FeS
Ricci, Fabio; Bousquet, Eric
2016In Physical Review Letters, 116, p. 227601
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Keywords :
Magnetoelectricity; Troilite; Ferroelectric
Abstract :
[en] We report on a first-principles study of the troilite phase of iron sulfide (FeS). We show that even if, a few decades ago, this material was thought to be ferroelectric, the structural transition from the high P63/mmc to the low P6¯2c symmetry phase does not involve polar instabilities, though the space inversion center symmetry is broken. Our calculations and symmetry analysis nevertheless reveal that FeS is magnetoelectric at room temperature with a response larger than the prototypical room-temperature magnetoelectric crystal Cr2O3. We also show that the spin channel decomposition of the polarization exhibits nonzero values in the opposite direction in FeS, which is actually a general hint of the presence of a magnetoelectric monopole in diagonal magnetoelectrics.
Disciplines :
Physics
Author, co-author :
Ricci, Fabio ;  Université de Liège > Département de physique > Physique théorique des matériaux
Bousquet, Eric  ;  Université de Liège > Département de physique > Physique théorique des matériaux
Language :
English
Title :
Unveiling the Room-Temperature Magnetoelectricity of Troilite FeS
Publication date :
03 June 2016
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
Volume :
116
Pages :
227601
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
Tier-1 supercomputer
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
Consortium des Equipements de Calcul Intensif (CECI) grant n.1175545, Tier-1, Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS grant n. 2.5020
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