Kondo dynamics in one-dimensional doped ferromagnetic insulators

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.

21 pages, 12 figures

References in corpus (10)

• The density-matrix renormalization group in the age of matrix product states
• The numerical renormalization group method for quantum impurity systems
• Real time evolution using the density matrix renormalization group
• Attractive and repulsive Fermi polarons in two dimensions
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Spin dynamics in a one-dimensional ferromagnetic Bose gas
• Bosonization of strongly interacting electrons
• Spin-charge separation in a strongly correlated spin-polarized chain
• Phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping
• Pseudospin ferromagnetism in double-quantum-wire systems