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Phys. Rev. B 65, 214406 (2002) [5 pages]

Small Fermi surface in the one-dimensional Kondo lattice model

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J. C. Xavier *, E. Novais †, and E. Miranda ‡
Instituto de Física Gleb Wataghin, Unicamp, Caixa Postal 6165, 13083-970 Campinas, São Paulo, Brazil

Received 14 January 2002; published 17 May 2002

We study the one-dimensional Kondo lattice model through the density-matrix renormalization group. Our results for the spin-correlation function indicate the presence of a small Fermi surface in large portions of the phase diagram, in contrast to some previous studies that used the same technique. We argue that the discrepancy is due to the open boundary conditions, which introduce strong charge perturbations that strongly affect the spin Friedel oscillations.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.65.214406
DOI: 10.1103/PhysRevB.65.214406
PACS: 75.10.-b, 71.10.Pm, 71.10.Hf

* Electronic address: jcxavier@ifi.unicamp.br
† Electronic address: peres@ifi.unicamp.br
‡ Electronic address: emiranda@ifi.unicamp.br

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