Figure 8
From: Protecting quantum correlations of the XXZ model by topological boundary conditions
(a) Critical temperature Tc of negativity versus the strength of magnetic field B in the topological XXZ model and the periodical XXZ model with J = 1 and Jz = 1.5. (b) Critical temperature Tc of negativity versus the inhomogeneity of magnetic field b in the topological XXZ model and the periodical XXZ model with J = 1 and Jz = 1.5.
