@article{oai:sucra.repo.nii.ac.jp:00012497, author = {佐宗, 哲郎}, issue = {1}, journal = {Journal of magnetism and magnetic materials}, month = {}, note = {http://www.sciencedirect.com/science/journal/03048853 | http://www.sciencedirect.com/science/journal/03048853, We have performed a new LDA+U band calculation on the prototypical Kondo insulator material YbB12, and constructed a simple tight-binding model with 5d and 4f Γ8 orbitals on Yb atoms with effective (ddσ) and (dfσ) integrals. A formation mechanism of the energy gap in Kondo insulators is clarified for the first time in a realistic model with orbital degeneracies in both conduction bands and 4f states., text, application/pdf}, pages = {38--39}, title = {Mechanism for opening of energy gap in Kondo insulators with orbital degeneracies}, volume = {272-276}, year = {2004}, yomi = {サソウ, テツロウ} }