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Chasing ghosts in reciprocal space - a novel inelastic neutron multiple scattering process

机译:在互易空间中追逐幽灵-一种新型的非弹性中子多重散射过程

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摘要

We have discovered that a recently reported weak excitation branch in the spin-Peierls material CuGeO3 is in fact a ghost image of the primary magnetic excitation shifted in reciprocal space by a novel multiple scattering process. A model is developed that predicts the occurrence of such multiple scattering and accounts for the observations in CuGeO3. New 'ghostons' can occur when the magnetic unit cell is smaller than the structural, while mixing of intensities from different reciprocal space zones jeopardize accurate polarisation analysis and the study of weak modes in general. (C) 2004 Elsevier B.V. All rights reserved.
机译:我们已经发现,自旋-Peierls材料CuGeO3中最近报告的弱激发分支实际上是通过新的多重散射过程在相互空间中移动的一次磁激发的幻影。开发了一个模型,该模型预测了这种多重散射的发生并解释了CuGeO3中的观察结果。当磁性晶胞小于结构时,会出现新的“重影”,而来自不同互易空间区域的强度混合会危害准确的极化分析和一般的弱模研究。 (C)2004 Elsevier B.V.保留所有权利。

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