SciPost Submission Page
Two Channel Multi impurity Kondo model
by Alexei M. Tsvelik and Gabriel Kotliar
Submission summary
| Authors (as registered SciPost users): | Alexei Tsvelik |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202502_00017v1 (pdf) |
| Date submitted: | 2025-02-11 02:53 |
| Submitted by: | Tsvelik, Alexei |
| Submitted to: | SciPost Physics |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
We show that the Ruderman-Kittel-Kasua-Yoisida interaction in two channel Kondo impurity systems is a relevant perturbation when the number of impurities N is greater than 3. We find a new critical point with anomalous dimensions 1/(N+1) for the spin operator and the Sommerfeld coefficient of the specific heat scales as $\gamma \sim T^{- \frac{3}{N+1}}$ Inter-channel hybridization plays the role of the most relevant operator at this fixed point having anomalous dimensions (N-1)/(2N+2). The critical point universal properties are relevant to many strong correlation problems, such as impurity placed in a Majorana metal and the multichannel Kondo lattice model of heavy fermion materials. We discuss relevance of our results for cluster DMFT studies of quantum criticality.
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