期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.127404
关键词
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资金
- NSC-Taiwan
- DOE [DE-FG02-03ER46076]
- U.S. Department of Energy (DOE) [DE-FG02-03ER46076] Funding Source: U.S. Department of Energy (DOE)
In the rich phase diagram of Na(x)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 root 12a and root 13a 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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