Raman phonons and ageing-related surface disorder in NaxCoO 2

M. N. Iliev, A. P. Litvinchuk, R. L. Meng, Y. Y. Sun, J. Cmaidalka, C. W. Chu

研究成果: Article同行評審

47 引文 斯高帕斯(Scopus)

摘要

The polarized Raman spectra from ab and ac surfaces of single crystal NaxCoO2 (x≈0.7), parent compound of recently discovered superconductor NaxCoO2·yH2O, are reported and discussed. The crystals were hexagon platelets of typical size 3×3×0.1 mm. Three of the five (A1g+E1g+3E 2g) Raman active phonons were unambiguously identified at 458 (E 1g), 494 (E2g) and 574 (A1g) cm-1. The spectra from ab and ac surfaces differ significantly and provide evidence that within hours after preparation the ac surface, unlike the ab one, is strongly disordered. Within several days the disorder extends over the ab surface too.

原文English
頁(從 - 到)239-242
頁數4
期刊Physica C: Superconductivity and its applications
402
發行號3
DOIs
出版狀態Published - 2004 二月 15

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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