ELECTRONIC STATES AT THE FERMI-LEVEL OF DOPED C-60

被引：31

作者：

DESETA, M

EVANGELISTI, F

机构：

[1] Department of Physics, Universita di Roma la Sapienze, 00185 Rome

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.71.2477

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The density of states of the lowest unoccupied molecular orbital band as a function of K doping was investigated by yield spectroscopy excited with visible and near-uv photons. The Fermi level position was determined at each composition with high precision. The superconducting phase K3Co60 exhibits a clear metallic edge, although the Fermi level is positioned at low state density [N(E(f))=0.8 +/- 0.2 states/eV molecule] past the band maximum. The K4C60 phase is insulating. Correlation effects are necessary to explain the data as a function of doping.

引用

页码：2477 / 2480

页数：4

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