2015/01/17 by Hudson Pimenta, L. N. Oliveira, Luiz N. Oliveira +1
Physics and Astronomy · #Bosonization #Condensed matter physics #Electron #Fermion #Ferromagnetism #Kondo effect #Kondo insulator #Magnon #Momentum (technical analysis) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Renormalization #Renormalization group #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.91.155143
published as Phys. Rev. B, 91, 155143 (2015) · 21 pages, 12 figures
arxiv created 2015/01/17 · openalex publication_date 2015/04/24 · arxiv updated 2015/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 coupling 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.