Three-dimensional electron momentum densities of graphite and fullerene: a comparison

被引：7
|
作者：
Metz, C
Tschentscher, T
Suortti, P
Kheifets, AS
Lun, DR
Sattler, T
Schneider, JR
Bell, F
机构：
[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[2] Australian Natl Univ, Res Sch Phys Sci & Engn, Atom & Mol Phys Lab, Canberra, ACT 0200, Australia
[3] DESY, Hamburger Synchrotronstrahlungslab Hasylab, D-22603 Hamburg, Germany
[4] Univ Munich, Sekt Phys, D-85748 Garching, Germany
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1999年 / 11卷 / 19期
关键词：
D O I：
10.1088/0953-8984/11/19/312
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on the three-dimensional electron momentum densities (EMD) of graphite and fullerene obtained by a so-called (gamma, e gamma) experiment, i.e. the coincident detection of an inelastically scattered hard x-ray photon with its recoil electron. A monochromatized flux of 10(12) photons s(-1) at 150 keV from the high-energy x-ray wiggler beamline of the ESRF was directed onto thin graphite or fullerene targets. Comparison with a pseudopotential and a full-potential linear muffin-tin orbital calculation in the case of graphite is made. Inclusion of electron correlation via the Lam-Platzman correction is discussed. The experimental EMD of C-60 shows stronger electron delocalization in the 'buckyball' compared to graphite, which is supported by theory.
引用
收藏
页码：3933 / 3942
页数：10
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