Photoemission Evidence for Dilute K-doped Phase Kx C60 with x<0.2
WANG Zuquan1, LIU Fengqin2, DENG Junzhuo2, YAO Jun2, XUN Kun3, LÜ Sihua1, WU Sichengi1,2, JIANG Mingluo4, GU Zhengnan5, ZHOU Xihuang5
1Department of Physics, Peking University, Beijing 100871
2Synchrotron Radiation Laboratory, Institute of High Energy Physics, Academia Sinica, Beijing 100039
3Department of Physics, Yantai University, Yantai 264005
4Institute of Semiconductor, Academia Sinica, Beijing 100083
5Department of Chemistry, Peking University, Beijing 100871
Photoemission Evidence for Dilute K-doped Phase Kx C60 with x<0.2
1Department of Physics, Peking University, Beijing 100871
2Synchrotron Radiation Laboratory, Institute of High Energy Physics, Academia Sinica, Beijing 100039
3Department of Physics, Yantai University, Yantai 264005
4Institute of Semiconductor, Academia Sinica, Beijing 100083
5Department of Chemistry, Peking University, Beijing 100871
Abstract： A shift about 0.3eV to higher binding energy is reported in the valence band and Cls core level of Kx C60(x<0.2). Analysis shows that the result could not be interpreted by a mixture of C60 and K3 C60. A dulite K-doped phase and fermi level pinning near the lowest unoccupied molecular orbital derived band
caused by K-doping are proposed.
1992, Vol. 9 
