Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2011-06-23
Condens. Matter Phys., 2011, vol. 14, No. 1, 13002:1-11
Physics
Condensed Matter
Statistical Mechanics
11 pages, 5 figures
Scientific paper
10.5488/CMP.14.13002
Phase transitions of the mixed spin-1/2 and spin-1 Ising-Heisenberg model on several decorated planar lattices consisting of interconnected diamonds are investigated within the framework of the generalized decoration-iteration transformation. The main attention is paid to the systematic study of the finite-temperature phase diagrams in dependence on the lattice topology. The critical behaviour of the hybrid quantum-classical Ising-Heisenberg model is compared with the relevant behaviour of its semi-classical Ising analogue. It is shown that both models on diamond-like decorated planar lattices exhibit a striking critical behaviour including reentrant phase transitions. The higher the lattice coordination number is, the more pronounced reentrance may be detected.
Galisova Lucia
Strecka Jozef
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