Thermal entanglement of the Ising–Heisenberg diamond chain with Dzyaloshinskii–Moriya interaction*
Qiao Jie, Zhou Bin
       
Schematic representation of the spin-1/2 Ising–Heisenberg diamond chain. The black circle S n 1 represents Heisenberg spin, and the blue circle σ n represents Ising spin. The black solid line corresponds to Heisenberg interaction, while the blue dashed line to Ising interaction.