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arXiv · 2011.12266

Ground state and thermodynamic properties of spin-1/2 isosceles Heisenberg triangles for V$_6$-like magnetic molecules

J. Torrico·J. A. Plascak
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Abstract

The spin-1/2 Hamiltonian for two coupled isosceles Heisenberg triangles, which is well suited for describing the V$_6$-type magnetic molecules, is studied by exact diagonalization. The quantum phase transition diagram, at zero temperature, is obtained as a function of the theoretical parameters. The zero temperature magnetization is also obtained as a function of the external magnetic field. The thermodynamic behavior of the magnetization, entropy, susceptibility, and specific heat, as a function of temperature, are also computed and the corresponding magnetocaloric effect analyzed for various values of the Hamiltonian parameters.

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J. Torrico, J. A. Plascak. 2020-11-24. Ground state and thermodynamic properties of spin-1/2 isosceles Heisenberg triangles for V$_6$-like magnetic molecules. https://doi.org/10.1103/physreve.102.062116

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