@article{oai:nagoya.repo.nii.ac.jp:00009521,
 author = {Ton-That, C. and Dowd, A. and Shard, A. G. and Dhanak, V. R. and Taninaka, A. and Shinohara, H. and Welland, M. E.},
 issue = {16},
 journal = {PHYSICAL REVIEW B},
 month = {Oct},
 note = {The electronic structure of potassium-doped La@C_82 has been studied with synchrotron-radiation photoelectron spectroscopy. Ultraviolet photoemission measurements indicate evolution of the valence-band states of La@C_82 with increasing potassium content, but K_xLa@C_82 remains semiconducting for all x between 0 and 6, with a band gap of at least 0.4 eV, in contrast to K-doped C_60. The valence-band features, including those which arise from the interactions of C_82 cages with La and K, show oscillatory behavior of photoemission intensity with incident photon energy. The strength of the oscillations varies between the states, and we associate diminished oscillations with increased localization of electron density. Finally, although core and valence states of La@C_82 change considerably with potassium dosage, the encapsulated La atom is well shielded from the outside chemical environment and its valency remains close to 3+.},
 pages = {165429--165429},
 title = {Electronic structure of potassium-doped La@C_82 metallofullerene studied with photoelectron spectroscopy},
 volume = {76},
 year = {2007}
}