Coexisting inequivalent orientations of C60 on Ag(001) -: art. no. 125406

被引：30
作者：
Cepek, C
Fasel, R
Sancrotti, M
Greber, T
Osterwalder, J
机构：
[1] INFM, Lab Nazl TASC, Area Sci Pk, I-34012 Trieste, Italy
[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland
[3] Swiss Fed Labs Mat Testing & Res, CH-8600 Dubendorf, Switzerland
[4] Univ Cattolica Sacro Cuore, INFM, I-25121 Brescia, Italy
[5] Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, I-25121 Brescia, Italy
来源：
PHYSICAL REVIEW B | 2001年 / 63卷 / 12期
关键词：
D O I：
10.1103/PhysRevB.63.125406
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
X-ray photoelectron diffraction has been used to determine the molecular orientation of C-60 adsorbed as a monolayer on the Ag(001) surface. From an extended comparison to single scattering cluster calculations, we find the presence of two inequivalent prevailing molecular orientations of the C-60 cage, as well as a considerable fraction of rotationally not-ordered molecules. In this system, scanning tunneling microscopy (STM) investigations have shown the presence of two differently imaged molecules that the authors proposed to originate from different bonding states [E. Giudice et al, Surf. Sci. 405, L561 (1998)]. Our analysis suggests a relation between imaging property and rotational order or not-order, while the two prevailing orientations are not distinguished by the existing STM data in this case.
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