Hexadecapolar Kondo Effect inURu2Si2?

Hexadecapolar Kondo effect in URu2Si2?

We derive the coupling of a localized hexadecapolar mode to conduction electrons in tetragonal symmetry. The derivation can be easily adapted to arbitrary multipoles in an arbitrary environment. We relate our model to the two-channel Kondo (2CK) model and show that for an f(2) configuration a relevant crystal field splitting in addition to the 2CK interaction is intrinsic to tetragonal symmetry...

Hexadecapolar colloids

Outermost occupied electron shells of chemical elements can have symmetries resembling that of monopoles, dipoles, quadrupoles and octupoles corresponding to filled s-, p-, d- and f-orbitals. Theoretically, elements with hexadecapolar outer shells could also exist, but none of the known elements have filled g-orbitals. On the other hand, the research paradigm of 'colloidal atoms' displays compl...

11 The Kondo Effect

Kondo effect in oscillating molecules

We consider electronic transport through break-junctions bridged by a single molecule in the Kondo regime. We describe the system by a two-channel Anderson model. We take the tunneling matrix elements to depend on the position of the molecule. It is shown, that if the modulation of the tunneling by displacement is large, the potential confining the molecule to the central position between the l...

KONDO EFFECT IN NON - EQUILIBRIUMTheory

In diiusive Cu and Au quantum wires at nite transport voltage U the non-equilibrium distribution function f(E; U) exhibits scaling behavior, f(E; U) = f(E=eU), indicating anomalous energy relaxation processes in these wires. We show that in nonequilibrium the Kondo eeect, generated either by magnetic impurities (single-channel Kondo eeect) or possibly by non-magnetic, degenerate two-level syste...