Non-universal critical behaviour of a mixed-spin Ising model on the extended Kagome lattice
The mixed spin-1/2 and spin-3/2 Ising model on the extended Kagome lattice is solved by establishing a mapping correspondence with the eight-vertex model. When the parameter of uniaxial single-ion anisotropy tends to infinity, the model system becomes exactly solvable as the staggered eight-vertex...
Збережено в:
| Видавець: | Інститут фізики конденсованих систем НАН України |
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| Дата: | 2006 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2006
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/121312 |
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| Цитувати: | Non-universal critical behaviour of a mixed-spin Ising model on the extended Kagome lattice / J. Strecka, L. Canova // Condensed Matter Physics. — 2006. — Т. 9, № 1(45). — С. 179–186. — Бібліогр.: 15 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The mixed spin-1/2 and spin-3/2 Ising model on the extended Kagome lattice is solved by establishing a mapping correspondence with the eight-vertex model. When the parameter of uniaxial single-ion anisotropy
tends to infinity, the model system becomes exactly solvable as the staggered eight-vertex model satisfying
the free-fermion condition. The critical points within this manifold can be characterized by critical exponents
from the standard Ising universality class. The critical points within another subspace of interaction parameters,
which corresponds to a coexistence surface between two ordered phases, can be approximated by
corresponding results of the uniform eight-vertex model satisfying the zero-field condition. This coexistence
surface is bounded by a line of bicritical points that have non-universal continuously varying critical indices |
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