Numerical determination of the phase diagram for (1/2,1/2,1) mixed diamond chains with anisotropy D reveals Néel, Tomonaga-Luttinger liquid, and ferrimagnetic phases plus an anisotropy inversion region.
In the isotropic case D = 0, the ground state is the QF phase with spontaneous magnetization msp = 1 per unit cell according to the Lieb-Mattis (LM) theorem
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Ground-State Phase Diagram of (1/2,1/2,1) Mixed Diamond Chains with Single-Site Anisotropy
Numerical determination of the phase diagram for (1/2,1/2,1) mixed diamond chains with anisotropy D reveals Néel, Tomonaga-Luttinger liquid, and ferrimagnetic phases plus an anisotropy inversion region.