Spin-1/2 asymmetric diamond Ising-Heisenberg chain

Details Spin-1/2 asymmetric diamond Ising-Heisenberg chain Spin-1/2 asymmetric diamond Ising-Heisenberg chain

2011-12-08

arxiv.org/abs/1112.1846v1

Ukrainian Journal of Physics, 2011, Vol. 56, no. 11, pp. 1237-1245

Physics

Condensed Matter

Statistical Mechanics

9 pages, 7 figures (http://www.ujp.bitp.kiev.ua)

Scientific paper

The ground state and the thermodynamics of a spin-1/2 asymmetric diamond Ising--Heisenberg chain are considered. For the $XYZ$ anisotropic Heisenberg interaction, the exact calculations of the free energy, entropy, heat capacity, magnetization, and magnetic susceptibility are performed using the method of decoration-iteration transformation. In the case of antiferromagnetic interactions (Ising and $XXZ$ anisotropic Heisenberg ones), the ground state, magnetization process, temperature dependence of the magnetization, magnetic susceptibility, and heat capacity are investigated. The influence of geometric frustration and quantum fluctuations on these characteristics is studied.

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