K3C60:: a strongly correlated metal with molecular disorder

被引：2

作者：

Goldoni, A

Sangaletti, L

Peloi, M

Parmigiani, F

Cornelli, G

Paolucci, G

机构：

[1] Sincrotrone Trieste SCpA, I-34012 Trieste, Italy

[2] Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, INFM, I-25121 Brescia, Italy

[3] INFM, Lab TASC, I-34012 Trieste, Italy

[4] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

来源：

SURFACE SCIENCE | 2001年 / 482卷

关键词：

photoelectron spectroscopy; fullerenes; alkali metals; surface electronic phenomena (work function; surface potential; surface states; etc.);

D O I：

10.1016/S0039-6028(00)01031-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper reports an ultra-violet photoemmision spectroscopy study on K3C60 in the temperature range 30-600 K. The experiment shows that the temperature dependence of the conduction band is consistent with the behaviour of a strongly correlated metal. In addition, the photoemission intensity near the Fermi edge decreases as the temperature is increased. This trend is similar to the vanishing behaviour of the quasi-particle weight predicted for strongly correlated metals with increasing disorder. The experimental evidence that the shoulder visible in the highest occupied molecular orbital region. unexpected on the basis of conventional band calculations, is coupled with the sharp peak at the Fermi level is also provided. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：476 / 481

页数：6

共 30 条

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ANDERSON PW, 1958, PHYS REV, V109, P1498

[2] AUGER AND PHOTOELECTRON STUDY OF THE HUBBARD-U IN C-60, K3C60, AND K6C60 [J].