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Type: Artigo de periódico
Title: Phase diagram of the two-leg Kondo ladder
Author: Xavier, JC
Miranda, E
Dagotto, E
Abstract: The phase diagram of the two-leg Kondo ladder is investigated using computational techniques. Ferromagnetism is present, but only at small conduction electron densities and robust Kondo coupling J. For densities ngreater than or similar to0.4 and any Kondo coupling, a paramagnetic phase is found. We also observed spin dimerization at densities n=1/4 and n=1/2. The spin-structure factor at small J peaks at (d) over right arrow=(2n,0)pi for nless than or similar to0.5, and at (d) over right arrow=(n,1)pi for ngreater than or similar to0.5. The charge structure factor suggests that electrons behave as free particles with spin -1/2 (spin-0) for small (large) J.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.70.172415
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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