Continuous canonical transformation for the double exchange model

Details Continuous canonical transformation for the double exchange model Continuous canonical transformation for the double exchange model

2001-07-16

arxiv.org/abs/cond-mat/0107331v1

Eur. Phys. J. B 23, 49 (2001).

Physics

Condensed Matter

Strongly Correlated Electrons

21 pages, 9 figures. Eur. Phys. J B (accepted for publication)

Scientific paper

10.1007/s100510170081

The method of continuous canonical transformation is applied to the double exchange model with a purpose to eliminate the interaction term responsible for non conservation of magnon number. Set of differential equations for the effective Hamiltonian parameters is derived. Within the lowest order (approximate) solution we reproduce results of the standard (single step) canonical transformation. Results of the selfconsistent numerical treatment are compared with the other known studies for this model.

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