1.

Kondo screening in high-spin side-coupled two-impurity clusters

It is shown how the two-stage Kondo screening phenomenology generalizes to a pair of side-coupled Kondo impurities with large spin: the two-stage Kondo screening occurs generically whenever S2 >= S1, where S1 is the spin of the impurity which couples directly with the band, while S2 is the spin of the side-coupled impurity.

COBISS.SI-ID: 23182631

2.

Van Hove singularities in the paramagnetic phase of the Hubbard model: a DMFT sutdy

We showed that electron-electron interactions smooth out van Hove singularities in the spectral functions of the Hubbard model, however the logarithmic singularity pinned at the Fermi level survives. In this latter case, the magnetic-field-induced metal-insulator-transition falls in a different universality class as for the case with featureless density of states, as there is no field-induced localization of quasiparticles.

COBISS.SI-ID: 23237415