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Heavy Quasiparticles in the Anderson Lattice Model

K. Tsutsui·Y. Ohta·R. Eder·S. Maekawa·E. Dagotto·J. Riera
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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 $f$-electron system play a key role in the formation of an almost dispersionless low-energy band of heavy quasiparticles.

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K. Tsutsui, Y. Ohta, R. Eder, S. Maekawa, E. Dagotto, J. Riera. 1995-11-13. Heavy Quasiparticles in the Anderson Lattice Model. https://doi.org/10.1103/physrevlett.76.279

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