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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nonuniform phases in metals with local moments

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Author(s):
Ghosh, A. ; Miranda, E.
Total Authors: 2
Document type: Journal article
Source: Physical Review B; v. 70, p. 214420-214425, Dec. 2004.
Field of knowledge: Physical Sciences and Mathematics - Physics
Abstract

The two-dimensional Kondo lattice model with both nearest and next-nearest neighbor exchange interactions is studied within a mean-field approach and its phase diagram is determined. In particular, we allow for lattice translation symmetry breaking. We observe that the usual uniform intersite order parameter is never realized, being unstable towards other more complex types of order. When the nearest neighbor exchange J1 is ferromagnetic the flux phase is always the most stable state, irrespective of the value of the next-nearest-neighbor interaction J2. For antiferromagnetic J1, however, either a columnar or a flux phase is realized, depending on conduction electron filling and the value of J2. (AU)

FAPESP's process: 01/00719-8 - Non-perturbative methods for strongly correlated electronic systems
Grantee:Amir Ordacgi Caldeira
Support Opportunities: Research Projects - Thematic Grants