Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-07-12
J. Phys. Soc. Jpn. 68 (1999) 3960.
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 9 figures, to appear in J. Phys Soc. Jpn. Vol. 68 No. 12, title changed and some corrections made
Scientific paper
10.1143/JPSJ.68.3960
Entanglement of spin and orbital Kondo effect is investigated on the basis of a Kondo-type exchange model with twofold orbital degeneracy. By using Wilson's numerical renormalization-group method, we examine dynamical and thermal properties respecting the difference in time-reversal property of multipole operators. In the presence of particle-hole symmetry, the model has a new non-Fermi-liquid fixed point with a fractional entropy. The spectral intensity of the quadrupole susceptibility diverges in the zero-frequency limit, while the dipole susceptibility shows a Fermi-liquid-like behavior. This is understood by mapping to the two-channel Kondo model, in which the dipole moment is mapped onto the operators with the scaling dimension $\Delta_m=1$, while the quadrupole moment onto the operators with another scaling dimension $\Delta_e=1/2$. Even for a fairly particle-hole asymmetric case with the Fermi-liquid ground state, the non-Fermi-liquid behavior has significant influences in electric and thermal properties.
Kuramoto Yoshio
Kusunose Hiroaki
No associations
LandOfFree
Crossover between Fermi Liquid and non-Fermi Liquid in Orbitally Degenerate Kondo Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Crossover between Fermi Liquid and non-Fermi Liquid in Orbitally Degenerate Kondo Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crossover between Fermi Liquid and non-Fermi Liquid in Orbitally Degenerate Kondo Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-130832