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Single-Crystal Structure Study of Iron Chalcogenides Fe1+delta Te1-xSx

机译:铁硫属元素Fe1 +δTe1-xSx的单晶结构研究

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Single crystals of iron chalcogenides Fe1 + delta Te1 - xSx (x = 0, 0.09, and 0.1) were studied by scanning, transmission, and scanning transmission electron microscopy. In addition, a sample with x = 0 was studied by X-ray diffraction. The Te-site disorder observed in Fe1 + delta samples is, apparently, assigned to the incorporation of superstoichiometric iron Fe2 into the structure. The Fe1 atoms were found to be displaced from their ideal positions, which can only partially be attributed to electro-optical effects. The replacement of Te atoms by S in Fe1 + delta Te1 - xSx crystals gives rise to domains with ordered S atoms in some regions of the single crystal, resulting in the formation of a 2 x 1 or 2 x 2 superstructure.
机译:通过扫描,透射和扫描透射电子显微镜研究了硫族铁元素Fe1 +δTe1-xSx(x = 0、0.09和0.1)的单晶。另外,通过X射线衍射研究了x = 0的样品。 Fe1 +δ样品中观察到的Te-site紊乱显然归因于将超化学计量的Fe2 +掺入结构中。发现Fe1原子偏离了它们的理想位置,这只能部分归因于电光效应。在Fe1 +δTe1-xSx晶体中用S取代Te原子会在单晶的某些区域中形成具有有序S原子的畴,从而形成2 x 1或2 x 2的超结构。

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