RAMAN-SCATTERING IN C-60 AND ALKALI-METAL-DOPED C-60 FILMS

被引:114
作者
WANG, KA
WANG, Y
ZHOU, P
HOLDEN, JM
REN, SL
HAGER, GT
NI, HF
EKLUND, PC
DRESSELHAUS, G
DRESSELHAUS, MS
机构
[1] UNIV KENTUCKY,CTR APPL ENERGY RES,LEXINGTON,KY 40511
[2] MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139
[3] MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139
[4] MIT,DEPT PHYS,CAMBRIDGE,MA 02139
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 04期
关键词
D O I
10.1103/PhysRevB.45.1955
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The Raman-active modes of solid films of C60 and MxC60 (x-6; M = K, Rb, Cs) have been studied experimentally. The mode activity is dominated by intraball interactions, and the effect of the M+ ions on the C60 spectrum is observed to be almost insensitive to the radius or mass of the alkali metal. The tangential modes of solid C60 are observed to soften in M6C60 by -60 cm-1, which can be attributed to a charge-transfer-induced elongation of the intraball bond lengths, similar to that observed in graphite intercalation compounds. Conversely, the radial modes are found to upshift slightly, indicating that a competing mechanism counteracts the effect of the bond elongation.
引用
收藏
页码:1955 / 1958
页数:4
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