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Zeitschrift für Physik B Condensed Matter
ISSN: 0722-3277 (printed version)
ISSN: 1431-584X (electronic version)
Abstract Volume 103 Issue 2 (1997) pp 267-270
Kondo lattice state within the slave boson approach: spin-split masses and effective interaction among heavy quasiparticles
Jozef Spalek (1), Roberta Citro (2)
(1) Institute of Physics, Jagiellonian University, ulica Reymonta 4, PL-30-059 Kraków, Poland
(2) Dipartimento di Fisica Teorica e S.M.S.A., Università di Salerno, I-84081 Baronissi (Salerno), Italy
Abstract. We provide a brief overview of our Hamiltonian approach to the the Kondo-lattice state at both finite Coulomb interaction U and nonzero applied magnetic field. In the mean-field approximation we introduce the spin-dependent effective masses, as well as calculate the effective Kondo (hybridization) temperature as a function of U. The effective interaction coming from the slave-boson exchange is shown to contain both the local (intraband) pairing and the Kondo (interband) interaction.
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