Abstract
An exact-diagonalization technique on small clusters is used to study the dynamics of the one-dimensional symmetric Anderson lattice model. Our calculated excitation spectra reproduce key features expected for an infinite Kondo lattice such as nearly localized low-energy spin excitations and extended regions of “heavy-quasiparticle” bands. We show that, in contrast to the hybridization picture, low-energy spin excitations of the nearly localized -electron system play a key role in the formation of an almost dispersionless low-energy band of heavy quasiparticles.
- Received 4 August 1995
DOI:https://doi.org/10.1103/PhysRevLett.76.279
©1996 American Physical Society