Electronic State of the Anderson Lattice over the Whole Temperature Range

概要

論文の詳細を見る
Earlier we proposed a modified version of the Anderson lattice model where the in-tersite coherence effects can be properly included even in the large limit of the spin-or-bital degeneracy N and investigated the low temperature Fermi liquid propertiesrigorously in the limit .N-+ 'C . In the present study, using the same model as above, weinvestigate properties over the whole temperature range through explicit numericalcalculations for .N= 6. We find that a coherence temperature T. of order of one tenthof the Kondo temperature T. exists; at lower temperature T<. T. the system is in theFermi liquid state, while at higher temperature I>>T. the electrons are scattered in-coherently by the Kondo impurities. At intermediate temperature, with increasing T,the hybridization gap appeared in the Fermi liquid state decreases rapidly at T 5 T.,then smoothly turns into the pseudo gap at Tz T, and finally the dense Kondoregime is realized at T>T..
社団法人日本物理学会の論文
1991-10-15