@article{oai:nitech.repo.nii.ac.jp:00005172,
 author = {Hihara, Takehiko and Yamada, Y. and Kato, M. and Peng, D. L. and Sumiyama, Kenji},
 issue = {12},
 journal = {JOURNAL OF APPLIED PHYSICS},
 month = {Dec},
 note = {Nb and NbN cluster-assembled films were produced by a plasma-gas-condensation cluster deposition apparatus and examined by transmission electron microscopy, electrical resistivity, and ultraviolet photoemission spectroscopy. The electron diffraction patterns of the Nb and NbN clusters displayed body-centered-cubic and NaCl-type diffraction rings, respectively. The electrical sheet resistance, R□, of both Nb and NbN cluster-assembled films, however, showed no superconductivity down to 2 K. We found a linear relation in the log R□ versus T-1/4 plot for the Nb cluster assembly, suggesting an electron localization effect. For the NbN cluster-assembly, on the other hand, R□ showed a semiconductor type temperature dependence, which is consistent with the valence electron spectra., application/pdf},
 pages = {7594--7597},
 title = {Electron transport properties in Nb and NbN cluster-assembled films produced by a plasma-gas-condensation cluster source},
 volume = {94},
 year = {2003}
}