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Hexadecapolar Kondo effect in URu2Si2?

Anna I Tóth¹, Gabriel Kotliar

¹Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854-8019, USA.

Physical Review Letters

|January 17, 2012

Summary

This summary is machine-generated.

We present a model for hexadecapolar Kondo effects in materials with tetragonal symmetry. This model explains experimental data for uranium ruthenium silicide compounds.

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Area of Science:

Condensed matter physics
Quantum magnetism
Materials science

Background:

Localized multipolar degrees of freedom can couple to conduction electrons.
Tetragonal symmetry imposes specific constraints on these interactions.
Understanding these couplings is key to novel quantum phenomena.

Purpose of the Study:

To derive the coupling of a localized hexadecapolar mode to conduction electrons in tetragonal symmetry.
To relate this coupling to the two-channel Kondo (2CK) model.
To discuss potential experimental realizations in URu(2)Si(2).

Main Methods:

Derivation of a model for hexadecapolar-electron coupling.
Analysis of the model in the context of the 2CK model.
Comparison with experimental data (susceptibility, specific heat).

Main Results:

A general derivation of multipolar couplings is presented.
For f(2) configurations, crystal field splitting is intrinsic to tetragonal symmetry alongside 2CK interaction.
The model shows good agreement with experimental measurements in Th(1-x)U(x)Ru(2)Si(2).

Conclusions:

The derived model successfully describes the hexadecapolar Kondo effect.
The findings are relevant for understanding complex magnetic behaviors in heavy fermion systems.
URu(2)Si(2) is a promising candidate for observing these effects.