Amorphization Effect for Kondo Semiconductor CeRu2Al10

11 The Kondo Effect

Electronic-structure-driven magnetic ordering in a Kondo semiconductor CeOs2Al10.

We report the anisotropic changes in the electronic structure of a Kondo semiconductor CeOs(2)Al(10) across an anomalous antiferromagnetic ordering temperature (T(0)) of 29 K, using optical conductivity spectra. The spectra along the a and c axes indicate that an energy gap due to the hybridization between conduction bands and nearly local 4f states, namely the c-f hybridization gap, emerges fr...

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...

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...