Phase diagram of a coupled tetrahedral Heisenberg model

Abstract

The phase diagram of a coupled tetrahedral Heisenberg model is obtained. The quantum chain has a local gauge symmetry and its eigenspectrum is obtained by the composition of the eigenspectra of spin-1/2 XXZ chains with arbitrary distribution of spin-3/2 impurities. The phase diagram is quite rich with an infinite number of phases with ferromagnetic, antiferromagnetic or ferrimagnetic order. In some cases the ground state and the low lying eigenlevels of the model can be exactly calculated since they coincide with the eigenlevels of the exactly integrable XXZ chain. The thermodynamical properties of the model at low temperatures is also studied through finite-size analysis.

23 pages, 15 figures

References in corpus (3)

• Quantum magnetization plateaux of an anisotropic ferrimagnetic spin chain
• Frustration-induced phase transitions in the spin-S orthogonal-dimer chain
• First-Order Phase Transitions in Frustrated Spin Systems

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• Peculiarities in pseudo-transitions of a mixed spin-$(1/2,1)$ Ising-Heisenberg double-tetrahedral chain in an external magnetic field
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• Frustrated quantum Heisenberg double-tetrahedral and octahedral chains at high magnetic fields
• Finite size effects around pseudo-transition in one-dimensional models with nearest neighbor interaction