Emergent helical texture of electric dipoles

doi:10.1126/science.aay7356

GSTDTAP > 气候变化

DOI	10.1126/science.aay7356
	Emergent helical texture of electric dipoles
	Dmitry D. Khalyavin; Roger D. Johnson; Fabio Orlandi; Paolo G. Radaelli; Pascal Manuel; Alexei A. Belik
	2020-08-07
发表期刊	Science
出版年	2020
英文摘要	In magnetic materials, magnetic dipoles typically line up parallel or antiparallel to each other. However, more complex orderings, such as helical, can also occur. Khalyavin et al. found that in the material BiCu0.1Mn6.9O12, a helical order can be formed out of electric rather than magnetic dipoles. The material also harbors an associated structural helical order, which symmetry analysis suggests might be switchable with an applied electric field. Science , this issue p. [680][1] Long-range ordering of magnetic dipoles in bulk materials gives rise to a broad range of magnetic structures, from simple collinear ferromagnets and antiferromagnets, to complex magnetic helicoidal textures stabilized by competing exchange interactions. In contrast, dipolar order in dielectric crystals is typically limited to parallel (ferroelectric) and antiparallel (antiferroelectric) collinear alignments of electric dipoles. Here, we report an observation of incommensurate helical ordering of electric dipoles by light hole doping of the quadruple perovskite BiMn7O12. In analogy with magnetism, the electric dipole helicoidal texture is stabilized by competing instabilities. Specifically, orbital ordering and lone electron pair stereochemical activity compete, giving rise to phase transitions from a nonchiral cubic structure to an incommensurate electric dipole and orbital helix via an intermediate density wave. [1]: /lookup/doi/10.1126/science.aay7356
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/288009
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Dmitry D. Khalyavin,Roger D. Johnson,Fabio Orlandi,et al. Emergent helical texture of electric dipoles[J]. Science,2020.
APA	Dmitry D. Khalyavin,Roger D. Johnson,Fabio Orlandi,Paolo G. Radaelli,Pascal Manuel,&Alexei A. Belik.(2020).Emergent helical texture of electric dipoles.Science.
MLA	Dmitry D. Khalyavin,et al."Emergent helical texture of electric dipoles".Science (2020).