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Electronic charge transfer driven by spin cycloidal structure
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DOI：10.1103/PhysRevB.101.224436.png)
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Muon spin rotation and resonant soft x-ray scattering experiments on prototype multiferroics RMn2O5 (R = Y, Sm) are used to demonstrate that the local electric displacements are driven by the spin-current (SC) mechanism. Small local electric displacements were evaluated by observing spin polarization at ligand O ions, for which implanted muons served as an extremely sensitive probe. Our results for YMn2O5 provide evidence that the spin polarization of O ions forming a spin cycloid chain with Mn spins increases in proportion to the vector spin chirality (S-i x S-j) of the Mn ions. This relationship strongly indicates that the charge transfer between O and Mn ions is driven by the SC mechanism, which leads to the ferroelectricity accompanying O spin polarization.
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IF:
3.7
论文数:
15.4W
被引数:
41.0W
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引用论文
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