Abstract:The anisotropic spin-1/2 antiferromagnetic Heisenberg systems are studied on three typical diamond-type hierarchical lattices (systems A, B and C) with fractal dimensions d f = 1.63, 2 and 2.58, respectively. For system A, using the real-space renormalization group approach, we calculate the phase diagram, the critical exponent and quantum discord, and find that there exists a reentrant behavior in the phase diagram. We also find that the quantum discord reaches its maximum at T = 0 and the thermal quantum dis… Show more
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