相图
星团(航天器)
超晶格
空位缺陷
结晶学
集群扩展
材料科学
相(物质)
物理
凝聚态物理
热力学
化学
量子力学
计算机科学
程序设计语言
作者
F. C. Chou,Ming Chu,G. J. Shu,F.-T. Huang,Woei Wu Pai,Hwo‐Shuenn Sheu,Patrick A. Lee
标识
DOI:10.1103/physrevlett.101.127404
摘要
In the rich phase diagram of ${\mathrm{Na}}_{x}{\mathrm{CoO}}_{2}$, $x=0.71$ enjoys special stability and is called the Curie-Weiss metal due to its anomalous properties. Similarly, $x=0.84$ prepared from high temperature melt is a special end point beyond which the system phase separates. Using synchrotron x-ray diffraction on single crystals, we discovered $\sqrt{12}a$ and $\sqrt{13}a$ superlattice structures which we interpret as the ordering of Na (vacancy) clusters. These results lead to a picture of coexisting local moments and itinerant carriers and form the first step towards understanding the many anomalous properties of cobaltates.
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