Real-space renormalization-group study of the exchange-interaction model
H. H. Chen, Felix Lee
Through use of an approximation introduced by Suzuki and Takano, the Migdal-Kadanoff (MK) renormalization-group transformation with the rescaling length b=2 is derived for the exchange-interaction (EI) model. Both the standard MK method and its modification, which preserves the free energy in the renormalization transformation, are used to determine critical temperatures and thermal exponents of the EI model on cubic lattices for various spins.
Physical review. B, Condensed matter•Dec 1, 1990•6 citations