Magnetic Doublon Bound States in the Kondo Lattice Model

Abstract

We present a novel pairing mechanism for electrons, mediated by magnons. These paired bound states are termed ``magnetic doublons''. Applying numerically exact techniques (full diagonalization and the density-matrix renormalization group, DMRG) to the Kondo lattice model at strong exchange coupling $J$ for different fillings and magnetic configurations, we demonstrate that magnetic doublon excitations exist as composite objects with very weak dispersion. They are highly stable, support a novel ``inverse'' colossal magnetoresistance and potentially other effects.

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Cited by in corpus (4)

• Magnetic Doublon Bound States in the Kondo Lattice Model
• Low-energy excitations and transport functions of the one-dimensional Kondo insulator
• Prerelaxation in quantum, classical, and quantum-classical two-impurity models
• Charge carrier relaxation dynamics in the one-dimensional Kondo lattice model