OBSERVATION OF A CHARGE-DENSITY-WAVE-INDUCED SUPERCELL IN SINGLE-CRYSTAL BA1-XKXBIO3

被引：9

作者：

DU, CH ^{[1
]}

HATTON, PD ^{[1
]}

TANG, HY ^{[1
]}

WU, MK ^{[1
]}

机构：

[1] TSING HUA UNIV,CTR MAT,HSINCHU,TAIWAN

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 39期

关键词：

D O I：

10.1088/0953-8984/6/39/001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The structure of Ba1-xKxBiO3 has been investigated by triple-crystal x-ray scattering on a variety of single crystals of different compositions. Attention has focused on the modulation observed by electron diffraction in the [110] directions. None of the incommensurate reflections observed in such studies have been observed with x-ray scattering, evidence that such observations are caused by electron-beam-induced damage. However, superlattice reflections have been observed at (hk0) half-integer positions, evidence of a larger supercell due to the presence of a charge density wave caused by the ordered disproportionation between nonequivalent Bi(III) and Bi(V) ions. This commensurate modulation exists in both semiconducting (x < 0.37) and superconducting (x > 0.37) compositions.

引用

页码：L575 / L581

页数：7

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