DIRECT OBSERVATION OF THE SUPERSTRUCTURE OF THE NEARLY COMMENSURATE PHASE IN 1T-TAS2 BY HIGH-RESOLUTION ELECTRON-MICROSCOPY
DIRECT OBSERVATION OF THE SUPERSTRUCTURE OF THE NEARLY COMMENSURATE PHASE IN 1T-TAS2 BY HIGH-RESOLUTION ELECTRON-MICROSCOPY
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DOI：
10.1002/pssa.2210960106
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发表时间：
1986-07-16
期刊：
影响因子：
--
通讯作者：
ENDOH, H
中科院分区：
文献类型：
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作者：
KUWABARA, M;TOMITA, M;ENDOH, H
近公度(N.C.)电荷密度波(CDW)引起的超结构用带有图像处理系统的高分辨电子显微镜和选区电子衍射法在原子尺度上研究了1TTaS_2的相。发现在电子衍射谱中首次观察到的Nc相的超结构在很大范围内具有非公度结构，并从理论上分析为非公度结构。观察到三重连续波各分量在三个方向上并不总是处于相同的模式，它们的分量存在一些异常和缺陷。还观察到超结构引起的条纹在晶体中位错附近改变了它们的方向。
The superstructure caused by the charge density wave (CDW) of the nearly commensurate (N. C.) phase in 1TTaS2is studied in atomic scale by a high resolution electron microscope with image processing system and a selected area electron diffraction method. It is found that the super‐structure of the N. C. phase, which was first observed in the electron diffraction pattern and analyzed theoretically as the discommensurate structure, has an incommensurate structure in a wide area. It is observed that the components of triple CDW are not always in the same mode in three directions and have some anomaly and defects in their components. It is also observed that the fringes due to the superstructure change their direction near the dislocation in the crystal.