GIANT VIBRATIONAL RESONANCES IN A6C60 COMPOUNDS

被引:79
作者
FU, KJ
KARNEY, WL
CHAPMAN, OL
HUANG, SM
KANER, RB
DIEDERICH, F
HOLCZER, K
WHETTEN, RL
机构
[1] UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024
[2] UNIV CALIF LOS ANGELES,CTR SOLID STATE,LOS ANGELES,CA 90024
[3] HUNGARIAN ACAD SCI,CENT RES INST PHYS,H-1525 BUDAPEST,HUNGARY
[4] CHINESE ACAD SCI,INST PHYS,BEIJING 100080,PEOPLES R CHINA
来源
PHYSICAL REVIEW B | 1992年 / 46卷 / 03期
关键词
D O I
10.1103/PhysRevB.46.1937
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Formation of alkali-C. compounds A(n)C60 (A = K, Rb) induces very large enhancements in the optical strength of two intra-C60 vibrational resonances and the emergence of a strong electronic transition centered at 1.2 eV. The vibrational spectra are particularly well defined for the A6C60 semiconductor comPounds, and it is proposed that the ca. ninetyfold enhancement of the 1428-cm-1 mode and its large shift (to 1342 cm-1 ) are generated by coupling to electronic excitations located on the molecule, consistent with recent theoretical descriptions of C60(6-) and the ionic solid bcc-A6+C60(6-).
引用
收藏
页码:1937 / 1940
页数:4
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