Electronic structure of K doped C60 monolayers on Ag(001)

被引:30
作者
Cepek, C
Sancrotti, M
Greber, T
Osterwalder, J
机构
[1] INFM, Lab Nazl TASC, I-34012 Trieste, Italy
[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland
关键词
alkali metals; fullerenes; photoelectron spectroscopy;
D O I
10.1016/S0039-6028(00)00135-7
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
The doping of a C-60/Ag(100) interface with K is studied by high resolution valence band photoemission spectroscopy. With increasing potassium exposure the progressive filling of the C-60 lowest unoccupied molecular orbital (LUMO) derived band is observed. The charge transfer onto the C-60 molecules is quantified from the observed binding energies of the LUMO derived band. Up to a half filled LUMO Ilo rigid band shift is found. Furthermore the intensity of the highest occupied molecular orbital is not constant but shows in normal emission a pronounced dip between half and complete LUMO filling. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:467 / 471
页数:5
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