Photoemission Spectroscopy and Electronic Structures of LiMn2O4
WU Qi-Hui1, THISSEN Andreas2, JAEGERMANN Wolfram2
1Department of Physics and Semiconductor Photonics Research Center, Xiamen University, Xiamen 361005
2Surface Science Institute, Department of Materials Science, Darmstadt University of Technology, Petersenstr. 23, 64287 Darmstadt, Germany
Photoemission Spectroscopy and Electronic Structures of LiMn2O4
WU Qi-Hui1;THISSEN Andreas2;JAEGERMANN Wolfram2
1Department of Physics and Semiconductor Photonics Research Center, Xiamen University, Xiamen 361005
2Surface Science Institute, Department of Materials Science, Darmstadt University of Technology, Petersenstr. 23, 64287 Darmstadt, Germany
Abstract：We study the electronic structures of LiMn2O4 by x-ray and ultraviolet photoelectron spectroscopy (XPS, UPS) and resonant photoelectron spectroscopy (RPES). XPS data suggest that the average oxidation state of Mn ions is 3.55, probably due to the small amount of lithium oxides on the surface. UPS and RPES data imply that Mn ions are in a high spin state, and RPES results show strong Mn3d--O2p hybridization in the LiMn2O4 valence band.
2006, Vol. 23 
