https://doi.org/10.1007/s100510170081
Continuous canonical transformation for the double exchange model
Institute of Physics,
M. Curie Skłodowska University,
20-031 Lublin, Poland
Corresponding author: a doman@kft.umcs.lublin.pl
Received:
30
November
2000
Revised:
16
March
2001
Published online: 15 September 2001
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.
PACS: 71.70.Gm – Exchange interactions / 75.10.-b – General theory and models of magnetic ordering / 75.30.Et – Exchange and superexchange interactions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
