Disorder and transport properties of In_3SbTe_2 - An X-ray, neutron and electron diffraction study

Schr?der T.; Rosenthal T.; Grott S.; Stiewe C.; De Boor J.; Oeckler O.

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Disorder and transport properties of In_3SbTe_2 - An X-ray, neutron and electron diffraction study

机译：In_3SbTe_2的无序和输运性质-X射线，中子和电子衍射研究

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Quenched metastable In_3SbTe_2 was investigated by X-ray and neutron powder diffraction as well as by single-crystal X-ray diffraction. The average structure corresponds to the rocksalt type, the anion position being occupied by antimony and tellurium. Neutron data indicate no antisite disorder of indium and antimony. The compound is a high-temperature phase that can be quenched to yield a metastable compound at ambient temperature which, upon heating, decomposes at ca. 320°C into InSb and InTe. Diffuse scattering in reconstructed X-ray and selected area electron diffraction patterns indicates local distortions of the crystal structure due to static atom displacement along <100> from the average positions, caused by the different size of the anions, but no superstructure. The electrical conductivity of In_3SbTe_2 is 3.2 × 10~4 S?cm~(-1) at 25°C, the temperature characteristics correspond to metallic behavior. Consequently, the thermal conductivity is also rather high. The decomposition into InSb and InTe reduces the electrical conductivity by a factor of 3 in heterogeneous microstructures.

机译：通过X射线和中子粉末衍射以及单晶X射线衍射研究了淬灭的亚稳态In_3SbTe_2。平均结构对应于岩盐类型，阴离子位置被锑和碲占据。中子数据表明没有铟和锑的抗位错。该化合物是高温相，可以在环境温度下淬灭以产生亚稳态化合物，该化合物在加热时在大约90℃下分解。 320°C注入InSb和InTe。重建的X射线和选定区域的电子衍射图样中的漫散射表明，由于阴离子的大小不同，但由于没有上部结构，导致静态原子从平均位置沿<100>沿平均位置位移导致晶体结构发生局部变形。 In_3SbTe_2在25°C时的电导率为3.2×10〜4 S？cm〜（-1），其温度特性与金属行为相对应。因此，热导率也很高。在异质微结构中，分解为InSb和InTe会使电导率降低3倍。

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《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2013年第14期|共6页
作者
Schr?der T.; Rosenthal T.; Grott S.; Stiewe C.; De Boor J.; Oeckler O.;
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正文语种 eng
中图分类化学;
关键词
Electron microscopy; Indium antimonide telluride; Metastable phase; Neutron diffraction; X-ray diffraction;

机译：电子显微镜;碲化铟铟;亚稳相;中子衍射;X射线衍射;

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Disorder and transport properties of In_3SbTe_2 - An X-ray, neutron and electron diffraction study

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