Figure 3
From: Protecting quantum correlations of the XXZ model by topological boundary conditions
(a) Concurrence of the boundary spins C13 versus temperature T in the topological XXZ model and the periodical XXZ model with J = 1 and Jz = 1.5. The blue dash line coincide with horizontal axis. (b) Critical temperature Tc of concurrence C13 versus the strength of magnetic field B in the topological XXZ model and the periodical XXZ model with J = 1 and Jz = 1.5.
