Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 83, Issue 1, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.83.014703
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan [23102709, 25103711]
- Japan Society for the Promotion of Science [24740230]
- Grants-in-Aid for Scientific Research [25103711, 24740230, 23102709] Funding Source: KAKEN
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Stimulated by recent studies of quantum phases with broken local inversion symmetry, we study the magnetoelectric effect in locally noncentrosymmetric metals. We consider three-dimensional (3D) coupled zigzag chains and demonstrate that the antiferromagnetic moment is induced by the electric current through a staggered antisymmetric spin-orbit coupling. This current-induced magnetism is much larger than that in globally noncentrosymmetric metals. We provide an intuitive understanding of the current-induced antiferromagnetic moment by showing the inverse magnetoelectric effect, that is, the ferroic p-wave charge nematic order accompanied by the asymmetric band structure in the antiferromagnetic state. We also examine conduction electrons coupled to localized spins via Kondo exchange coupling and demonstrate a significant enhancement of the magnetoelectric effect. A possible experimental observation of the magnetoelectric effect in metals is discussed, with focus on LnM(2)Al(10) compounds, such as NdRu2Al10 and TbRu2Al10.
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