@article{oai:kyutech.repo.nii.ac.jp:00000299,
 author = {Kohiki, Shigemi and 古曵, 重美 and Suzuka, Takayuki and Oku, Masaoki and Yamamoto, Tetsuya and Kishimoto, Seiichi and Iida, Seishi},
 issue = {2},
 journal = {Journal of Applied Physics},
 month = {Jan},
 note = {A vapor-phase-grown epitaxial ZnS:Ag layer simultaneously codoped with In and N on GaAs substrate exhibited a 436-nm light emission and p-type conduction with a low resistivity. X-ray photoemission spectroscopy revealed that the In 3d5/2 electron binding energy of the codoped ZnS:In,N layer was smaller by 0.5 eV than that of the ZnS:In independently doped layer, although the 2p3/2 electron binding energies of Zn and S of the codoped layer agreed well with those of the independently doped layer, respectively. The reduction of binding energy was ascribed to an increase in the electronic relaxation energy for core-hole states in photoemission and reflects a large charge transfer between the In and N atoms at the first neighbor sites through covalent sp3 bonding orbitals. An increase of the spectral intensity at around 4 eV relative to the valence band maximum observed for the codoped layer corresponds to a new state at –3.67 eV from the valence band maximum due to a strong coupling between the In 5s and N 2p orbitals at the first neighbor sites, derived from a first-principle band structure calculation for ZnS:(In,2N).},
 pages = {760--763},
 title = {Coupling of codoped In and N impurities in ZnS:Ag: Experiment and theory},
 volume = {91},
 year = {2002},
 yomi = {コヒキ, シゲミ}
}