corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 76 » Issue 2
< Previous Article | Next Article >

Phys. Rev. Lett. 76, 279–282 (1996)

Heavy Quasiparticles in the Anderson Lattice Model

Download: PDF (157 kB) Buy this article Export: BibTeX or EndNote (RIS)

K. Tsutsui1, Y. Ohta2, R. Eder3, S. Maekawa1, E. Dagotto4, and J. Riera5
1Department of Applied Physics, Nagoya University, Nagoya 464-01, Japan
2Department of Physics, Chiba University, Chiba 263, Japan
3Department of Applied and Solid State Physics, University of Groningen, The Netherlands
4Department of Physics, National High Magnetic Field Laboratory and Martech, Florida State University, Tallahassee, Florida 32306
5Departamento de Fisica, Fac. de Cs. Exactas e Ingeniera, 2000-Rosario, Argentina

Received 4 August 1995; published in the issue dated 8 January 1996

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.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.279
DOI:
10.1103/PhysRevLett.76.279
PACS:
71.27.+a, 71.28.+d, 75.20.Hr
 
< Previous Article | Next Article >