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arXiv · 1501.04220

Kondo dynamics in one-dimensional doped ferromagnetic insulators

Hudson Pimenta·Luiz N. Oliveira·Rodrigo G. Pereira
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Abstract

Some well-established examples of itinerant-electron ferromagnetism in one dimension occur in a Mott-insulating phase. We examine the consequences of doping a ferromagnetic insulator and cou- pling magnons to gapless charge fluctuations. Using a bosonization scheme for strongly interacting electrons, we derive an effective field theory for the magnon-holon interaction. When the magnon momentum matches the Fermi momentum of the holons, the backscattering of the magnon at low energies gives rise to a Kondo effect of a pseudospin defined from the chirality degree of freedom (right- or left-moving particles). The crossover between weak-coupling and strong-coupling fixed points of the effective mobile-impurity model is then investigated using a numerical renormalization group approach.

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Hudson Pimenta, Luiz N. Oliveira, Rodrigo G. Pereira. 2015-01-17. Kondo dynamics in one-dimensional doped ferromagnetic insulators. https://doi.org/10.1103/physrevb.91.155143

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