Fine structure of K_3C_(60) photoionization cross-section oscillations  

作　　者：李宏年 应理建 倪敬付 李刚 王鹏 奎热西.易卜拉欣 钱海杰 

机构地区：[1]Department of Physics, Zhejiang University [2]Laboratory of Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics C》2009年第11期991-995,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10674115);Beijing Synchrotron Radiation Facility

摘　　要：The synchrotron radiation angle-resolved photoemission data of K3C60 single crystal film are analyzed, aiming at the photoionization cross-sections of the LUMO, HOMO and HOMO-1 bands in low photon energy region （14.5--27.5 eV）. Many fine structures of the HOMO/HOMO-1 intensity ratios are observed, which support the general validity of a quantum chemistry model. However, the experimental data and the theoretical results have some disagreement in the energy positions and magnitudes of the fine structures, and the disagreement is more outstanding than the case of pure C60. So the photoemission data of K3C60 afford valuable experimental reference to further theoretical developments. The LUMO cross-section data, which cannot be discussed with the quantum chemistry description due to strong solid state effects, are also reported for further studies.The synchrotron radiation angle-resolved photoemission data of K3C60 single crystal film are analyzed, aiming at the photoionization cross-sections of the LUMO, HOMO and HOMO-1 bands in low photon energy region （14.5--27.5 eV）. Many fine structures of the HOMO/HOMO-1 intensity ratios are observed, which support the general validity of a quantum chemistry model. However, the experimental data and the theoretical results have some disagreement in the energy positions and magnitudes of the fine structures, and the disagreement is more outstanding than the case of pure C60. So the photoemission data of K3C60 afford valuable experimental reference to further theoretical developments. The LUMO cross-section data, which cannot be discussed with the quantum chemistry description due to strong solid state effects, are also reported for further studies.

关 键 词：photoionization cross-section fine structure K3C60 

分 类 号：O472.8[理学—半导体物理]