Numerical renormalization-group study of particle-hole symmetry breaking in two-channel kondo problem: Effect of repulsion among conduction electrons and potential scattering

H. Kusunose, K. Miyake, Y. Shimizu, O. Sakai

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

Particle-hole symmetry breaking perturbation in the two-channel pseudospin Kondo problem is studied by the numerical renormalization-group method. It is shown that the repulsion among conduction electrons at the impurity site and the single particle potential are relevant perturbations against the conventional non-Fermi-liquid fixed point. Although the repulsion (potential) with realistic strength prevents the overscreening of the pseudospin, it induces in turn a real spin, which is also overscreened again. Thus the real spin susceptibility becomes anomalous, contrary to the conventional two-channel Kondo problem.

Original languageEnglish
Pages (from-to)271-274
Number of pages4
JournalPhysical review letters
Volume76
Issue number2
DOIs
Publication statusPublished - 1996 Jan 8

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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