Critical properties of two-dimensional systems with randomly mixed Ising and Heisenberg bonds
- 14 December 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (23) , 4785-4791
- https://doi.org/10.1088/0022-3719/10/23/012
Abstract
Using the high-temperature series expansion method the critical temperature and critical index gamma for a system consisting of a random mixture of Ising and Heisenberg couplings have been estimated. It has been found that gamma as a function of concentration p of Heisenberg-type bonds has a minimum the location of which depends strongly on the ratio of the Ising to Heisenberg coupling constants. It is conjectured that this might correspond to a change in the character of the transition.Keywords
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