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arXiv 2006.15834cond-mat.str-el
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自旋摆线结构驱动的电子电荷转移

Electronic charge transfer driven by spin cycloidal structure

Y. Ishii, S. Horio, Y. Noda, M. Hiraishi, H. Okabe, M. Miyazaki, S. Takeshita, A. Koda, K. M. Kojima, R. Kadono, H. Sagayama, H. Nakao, Y. Murakami, H. Kimura

摘要:

利用μ子自旋旋转和共振软X射线散射实验研究了原型多铁性材料RMn_2O_5(R = Y,Sm)的局域电位移是由自旋电流机制驱动的.小的局部电位移进行了评估,通过观察自旋极化在配体O离子,其中注入μ子作为一个非常敏感的探针。我们的研究结果为YMn2O5提供了证据,形成一个自旋摆线链与Mn自旋的O离子的自旋极化增加成比例的Mn离子的矢量自旋手征(Si x Sj)。这种关系强烈地表明,O和Mn离子之间的电荷转移是由SC机制驱动的,这导致了伴随O自旋极化的铁电性。

英文摘要:

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 (Si x Sj ) 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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