The ground state magnetic phase diagram of the ferromagnetic Kondo-lattice model

Details The ground state magnetic phase diagram of the ferromagnetic Kondo-lattice model The ground state magnetic phase diagram of the ferromagnetic Kondo-lattice model

2009-01-19

arxiv.org/abs/0901.2855v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 6 figures, accepted for publication in PRB (2009)

Scientific paper

10.1103/PhysRevB.79.064411

The magnetic ground state phase diagram of the ferromagnetic Kondo-lattice model is constructed by calculating internal energies of all possible bipartite magnetic configurations of the simple cubic lattice explicitly. This is done in one dimension (1D), 2D and 3D for a local moment of S = 3/2. By assuming saturation in the local moment system we are able to treat all appearing higher local correlation functions within an equation of motion approach exactly. A simple explanation for the obtained phase diagram in terms of bandwidth reduction is given. Regions of phase separation are determined from the internal energy curves by an explicit Maxwell construction.

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