Splitting of the electronic states near E(F) in A(4)C(60) compounds (A equals alkali metal)

被引：12

作者：

Knupfer, M ^{[1
]}

Fink, J ^{[1
]}

Armbruster, JF ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM KARLSRUHE, INST NUKL FESTKORPERPHYS, D-76021 KARLSRUHE, GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1996年 / 101卷 / 01期

关键词：

D O I：

10.1007/s002570050180

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electronic structure of A(4)C(60) compounds (A = Na, K, Cs) has been studied using electron energy-loss spectroscopy. Both the low energy loss functions and Cls core excitation measurements reveal a strong splitting of the electronic states near the Fermi level in comparison with K3C60 or K6C60. This splitting indicates a lowering of the high degeneracy of the C-60 molecular orbitals due to a broken symmetry ground state and/or the opening of a correlation gap in these systems.

引用

页码：57 / 60

页数：4

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