Exactly solvable Ising--Heisenberg chain with triangular XXZ-Heisenberg plaquettes

Physics – Condensed Matter – Statistical Mechanics

Scientific paper

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16 pages, 12 figures

Scientific paper

10.1103/PhysRevB.79.014432

A mixed Ising-Heisenberg spin system consisting of triangular XXZ-Heisenberg spin clusters assembled into a chain by alternating with Ising spins interacting to all three spins in the triangle is considered. The exact solution of the model is given in terms of the generalized decoration--iteration map and within the transfer-matrix technique. Exact expressions for thermodynamic functions are derived. Ground state phase diagrams, thermodynamic and magnetic properties of the system are examined.

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